Sonic Underground Episode Guide (1999) – All 40 Episodes

Sonic Underground · Season 1 · 1999
Series	Sonic Underground (DiC, 1999)
Episodes	40 in one season · production nos. 401–440 · WildBrain nos. 101–140
First aired	France: 6 January – 23 May 1999 (TF1) UK: from 2 May 1999 (ITV, GMTV) US: 30 August – 22 October 1999 (BKN Kids II)
Premiere	Wedding Bell Blues (France) · Beginnings (US)
Final episode	Virtual Danger
Directed by	Marc Boreal, François Hemmen, Daniel Sarriet; Tom Smith (US)
Main writers	Ben Hurst & Pat Allee (13 episodes), Mark Edens (8), Len Janson (6), Michael Edens (4)
Songs	One per episode, by Mike Piccirillo; theme by Robby London and Mike Piccirillo
DVD	Shout! Factory, two volumes (2007–2008); NCircle complete series (2023)
Watch	Official full episodes on WildBrain’s YouTube channels

A moment from the Oracle’s vision of the Council of Four, in “Beginnings”.Screenshot: *Sonic Underground* (1999), “Beginnings” · via Sonic Wiki Zone

Sonic Underground ran for a single season of 40 episodes, made in one go by DiC and its French partners and shown first in France in 1999. Each episode is a self-contained adventure with a song in the middle, but running through the season are a few longer threads: the prophecy of the Council of Four, two three-part stories, and a mother who is always just out of reach.

This guide lists the episodes in production order, which is also the order of Luke’s original Sonic Scene guide, of TF1’s first run in France and of WildBrain’s official uploads (numbered 101–140). The American broadcast started somewhere else entirely, with Beginnings, and if you want the story from the start, that is where to begin: the Origins trilogy is episodes 26, 28 and 30.

Luke’s original page for the show was a 40-row table: picture, episode number, title, song, writer and air dates for the US and France. Every row of it lives on below, checked against other sources, with a synopsis and a page of its own for every episode.

— About Luke’s original Sonic Underground guide on Sonic Scene

40episodes in one season
40songs, one in every episode
3royal siblings
6 Jan 1999world premiere, TF1 (France)
22 Oct 1999last new US episode

Quick Answers

How many episodes of Sonic Underground are there?

Forty, all in one season. Writer Ben Hurst later told fans in an online chat that only 40 were ever planned, which settled an old rumour of 65 episodes with 25 unaired (Wikipedia and Sonic Wiki Zone disagree on whether the chat was in 2006 or 2008).

What order should I watch them in?

This guide uses production order, which starts with Wedding Bell Blues. The story itself starts with the Origins trilogy: Beginnings, Getting to Know You and Harmony or Something. The US premiere opened with Beginnings, and fan lists such as Sonic Retro’s put the trilogy first.

When and where did it first air?

In France, on TF1, from 6 January 1999. The English version followed on 2 May 1999 in the UK (ITV), then on 30 August 1999 in the US on the syndicated BKN Kids II block, where all 40 episodes ran on weekday mornings until 22 October.

Does Sonic Underground have an ending?

No. The final episode, Virtual Danger, is a standalone adventure, and the prophecy of the Council of Four is never fulfilled. Archie Comics planned an epilogue years later, but it was never published. The full story is on the series page.

Who sings for Sonic, Sonia and Manic?

Jaleel White speaks for all three siblings, but each has a different singing voice: Samuel Vincent for Sonic, Stevie (Louise) Vallance for Sonia and Tyley Ross for Manic. See the songs.

Where can I watch it?

Every episode is on WildBrain’s official YouTube channels, linked from each episode page. The whole series is also on DVD, most recently NCircle Entertainment’s four-disc complete series (2023).

Story Arcs & Running Threads

Most episodes stand alone, but a handful of threads run through the season. Here they are, with the episodes to watch for each.

The Origins trilogyEps 26, 28, 30

How Queen Aleena gave up her children, how the siblings found each other, and how the Oracle’s teachers turned three squabbling teenagers into a band. In production order the three parts alternate with the Chaos Emerald story: Beginnings, Getting to Know You, Harmony or Something.

Queen Aleena with one of her babiesBeginnings
Training with Gondar in the forestGetting to Know You
A snowy mountainsideHarmony or Something

Knuckles and the Chaos EmeraldEps 16, 25, 27, 29

Knuckles arrives in Friend or Foe? as a guardian tricked into fighting the hedgehogs, then returns for a three-parter: the Flying Fortress, the broken Emerald in No Hedgehog Is an Island and his deal with Robotnik in New Echidna in Town.

KnucklesFriend or Foe?
KnucklesNo Hedgehog Is an Island
KnucklesNew Echidna in Town

So close to MotherEps 1, 7, 10, 12, 13, 17, 19, 34

Queen Aleena is never far away. She speaks to the crowd in Wedding Bell Blues, sends Sonia a necklace in Come Out Wherever You Are, comforts Manic in A Hedgehog’s Home Is Her Castle, leaves notes signed “Q.A.” in Artifact and Head Games, and saves Manic in Sonia’s Choice, but her children never quite catch her.

The Queen Aleena monument signThe Deepest Fear
The message in Sonic’s chili-dog bagHead Games
Sonic and the falling chandelierA Hedgehog’s Home Is Her Castle

Sonia’s worldEps 1, 4, 9, 10, 33, 37

Raised as an aristocrat, Sonia keeps one foot in high society: her old friend Bartleby (Wedding Bell Blues, Bartleby the Prisoner), her best friend Mindy (The Price of Freedom), the debutante ball (Come Out Wherever You Are) and Stripes, who falls for her in The Last Resort.

Sonia and Sonic in disguiseWedding Bell Blues
Sonia and StripesThe Last Resort
A confused BartlebyHealer

Manic’s streetsEps 3, 5, 13, 14, 20, 21

The youngest sibling grew up a thief, and the show keeps testing him: the home he finds in Mobodoon, his old gang in Underground Masquerade, the bomb he sells in Artifact, the robot baby he loves in Three Hedgehogs and a Baby.

Sonic, Manic and SoniaMobodoon
Manic on his hoverboardThree Hedgehogs and a Baby
Dr. RobotnikArtifact

Cyrus and the SanctuaryEps 6, 20, 36, 40

Sonic’s friend Cyrus starts as Robotnik’s spy (Tangled Webs) and becomes the Resistance’s technician; the Sanctuary for the Resistance’s children returns in Three Hedgehogs and a Baby; and Cyrus loses his father in Sleepers.

Cyrus, Sonic’s old friendTangled Webs
Sonia and CyrusSleepers
Sonia and CyrusVirtual Danger

Episode Guide

All 40 episodes in production order: the order of Luke’s original guide, of TF1’s first run in France and of WildBrain’s official uploads. “US” gives each episode’s place in the American broadcast, which began with Beginnings. Every title links to a full episode page with a synopsis, key moments, trivia and the official video.

#	Episode	First aired	Song & story
1US 26th	Wedding Bell BluesL’union fait la farceWritten by Ben Hurst and Pat Allee	FR 6 Jan 1999 US 4 Oct 1999	♪ “When Tomorrow Comes” Robotnik announces he will marry Queen Aleena, then tries to make himself king by adopting Sonia. Synopsis ↓
2US 2nd	To Catch a QueenÉchec à la reineWritten by Doug Booth	FR 10 Jan 1999 US 31 Aug 1999	♪ “Have You Got the 411?” The captain of the Queen’s guard is captured on his way to meet her, and the siblings set out to rescue him. Synopsis ↓
3US 3rd	MobodoonMobourg-LatourWritten by Peter Hunzinger (Wikipedia: Peter Hunziker)	FR 13 Jan 1999 US 1 Sep 1999	♪ “I’ve Found My Home” On their birthday the triplets find Mobodoon, the hidden town where they were born, and Manic wants to stay for good. Synopsis ↓
4US 4th	The Price of FreedomCourse contre la montreWritten by Martha Moran	FR 17 Jan 1999 US 2 Sep 1999	♪ “Money Can’t Buy” Sonia’s best friend gives her a watch that turns out to be one of Robotnik’s spy devices. Synopsis ↓
5US 5th	Underground MasqueradeBal du ducWritten by Rick Merwin	FR 20 Jan 1999 US 3 Sep 1999	♪ “Let the Good Times Roll” Sleet and Dingo pocket a duke’s tribute and frame Manic, just as he reunites with his old gang of thieves. Synopsis ↓
6US 6th	Tangled WebsHolodrameWritten by Ben Hurst and Pat Allee	FR 24 Jan 1999 US 6 Sep 1999	♪ “Teach the Children, Light the Way” Sonic’s old friend Cyrus is secretly working for Robotnik, until he sees what the Resistance is protecting. Synopsis ↓
7US 7th	The Deepest FearSans peur et sans romochesWritten by Michael Edens and Mark Edens	FR 27 Jan 1999 US 7 Sep 1999	♪ “Face Your Fear” A sea monster is sinking ships at Port Mobius, and Sonic, who cannot swim, has to face the open water. Synopsis ↓
8US 8th	Who Do You Think You AreParfums d’OrientWritten by Ben Hurst and Pat Allee	FR 31 Jan 1999 US 8 Sep 1999	♪ “We Need to Be Free” Searching for the Queen’s journals in Tashistan, Sonia loses her memory and sells her own medallion. Synopsis ↓
9US 9th	The Last ResortComment résister ?Written by Michael Edens	FR 3 Feb 1999 US 9 Sep 1999	♪ “Listen to Your Heart” A peaceful mountain resort survives by making deals with Robotnik, and its charming leader falls for Sonia. Synopsis ↓
10US 10th	Come Out Wherever You AreBal explosifWritten by Ben Hurst and Pat Allee	FR 7 Feb 1999 US 10 Sep 1999	♪ “Society Girl” Sonia’s big night at a debutante ball clashes with a mission to hijack Robotnik’s new Predator aircraft. Synopsis ↓
11US 11th	Winner Fakes AllCourse d’obstaclesWritten by Mark Edens	FR 10 Feb 1999 US 13 Sep 1999	♪ “Built for Speed” Robotnik stages a race for Mobius’s fastest athletes as a trap for Sonic, and catches the wrong hedgehogs. Synopsis ↓
12US 12th	A Hedgehog’s Home Is Her CastleLa vie de châteauWritten by Len Janson	FR 14 Feb 1999 US 14 Sep 1999	♪ “Let’s Do It to It” Sonia inherits a spooky castle, and the siblings come closer than ever to their mother. Synopsis ↓
13US 13th	ArtifactObjet de voleurWritten by Michael Edens	FR 17 Feb 1999 US 15 Sep 1999	♪ “You Can’t Own Everything” Robotnik auctions “artifacts” from a lost city, and the siblings discover they are actually bombs. Synopsis ↓
14US 14th	Bug!RobestiolesWritten by Len Janson	FR 21 Feb 1999 US 16 Sep 1999	♪ “Never Give Up” Robotnik’s robot bugs turn Freedom Fighters into his slaves, and Manic is stung. Synopsis ↓
15US 15th	Sonic TonicTonisonicWritten by Mark Edens	FR 24 Feb 1999 US 17 Sep 1999	♪ “The Fastest Thing Alive” (also listed as “I Wish I Could Go Faster”) Robotnik brews a potion that gives anyone Sonic’s speed, with some very big side effects. Synopsis ↓
16US 16th	Friend or Foe?L’île d’émeraudeWritten by Kevin Donahue	FR 28 Feb 1999 US 20 Sep 1999	♪ “Not Always What They Seem” On the Floating Island, Sleet and Dingo trick Knuckles into fighting the hedgehogs while they go for the Chaos Emerald. Synopsis ↓
17US 17th	Head GamesRéserve surnaturelleWritten by Michael Edens	FR 3 Mar 1999 US 21 Sep 1999	♪ “Take a Chance” Bartleby plans a resort on sacred Speedster Island, and the medallions wake its stone guardians. Synopsis ↓
18US 18th	When in Rome…Vouloir c’est pouvoirWritten by Len Janson	FR 7 Mar 1999 US 22 Sep 1999	♪ “Where There’s a Will, There’s a Way” The Oracle strips the siblings of their medallions and sends them to a Roman world ruled by a Sleet look-alike. Synopsis ↓
19US 19th	The Jewel in the CrownMission diadèmeWritten by Mark Edens	FR 10 Mar 1999 US 23 Sep 1999	♪ “The Cosmic Dance” A jewel that glows near Queen Aleena could lead the siblings to her, or into a trap. Synopsis ↓
20US 20th	Three Hedgehogs and a BabyBB AJTWritten by Len Janson	FR 14 Mar 1999 US 24 Sep 1999	♪ “Being a Kid Is Cool” Manic babysits an abandoned baby hedgehog, which turns out to be a Robotnik spy sent to find Sanctuary. Synopsis ↓
21US 21st	Dunes DayNomade’s LandWritten by Mark Edens	FR 17 Mar 1999 US 27 Sep 1999	♪ “True Blue Friend” Recruiting desert nomads for the Resistance, Manic discovers that their chief is hiding a dangerous secret. Synopsis ↓
22US 22nd	Mummy DearestLe parcheminWritten by Ben Hurst and Pat Allee	FR 21 Mar 1999 US 28 Sep 1999	♪ “Mummy Wrap” A book about the royal dynasty leads the siblings to a desert temple, where an ancient mummy wants a song. Synopsis ↓
23US 23rd	Hedgehog in the Iron MaskMascaradeWritten by Bob Forward	FR 24 Mar 1999 US 29 Sep 1999	♪ “Part of the Problem” A masked prisoner who claims to be the triplets’ uncle turns them against each other. Synopsis ↓
24US 24th	Six Is a CrowdMonde parallèleWritten by Len Janson	FR 28 Mar 1999 US 30 Sep 1999	♪ “I Can Do That for You” In a mirror world, Robotnik leads the rebels and the hedgehog royals are greedy tyrants. Synopsis ↓
25US 25th	Flying FortressLa forteresse volanteWritten by Mark Edens	FR 31 Mar 1999 US 1 Oct 1999	♪ “No One Is an Island” Robotnik’s Flying Fortress is powered by a Chaos Emerald, and Sonic needs Knuckles to stop it. Synopsis ↓
26US 1st	BeginningsOn reprend au débutWritten by Ben Hurst and Pat Allee	FR 4 Apr 1999 US 30 Aug 1999	♪ “Someday” Queen Aleena tells how Robotnik took power and why she gave her triplets away. Synopsis ↓
27US 27th	No Hedgehog Is an IslandDur comme la pierreWritten by Mark Edens	FR 7 Apr 1999 US 5 Oct 1999	♪ “Learn to Overcome” The broken Chaos Emerald unleashes disasters, and Knuckles’ great-grandfather says Robotnik is the only answer. Synopsis ↓
28US 28th	Getting to Know YouS’entraîner à s’entraiderWritten by Ben Hurst and Pat Allee	FR 11 Apr 1999 US 6 Oct 1999	♪ “Working Together in Harmony” The newly reunited siblings begin their training with the Oracle’s teachers. Synopsis ↓
29US 29th	New Echidna in TownDur, Dur-DurWritten by Mark Edens	FR 14 Apr 1999 US 7 Oct 1999	♪ “The Mobius Stomp” Knuckles makes a deal with Robotnik to save Mobius, and Dingo swallows the Chaos Emerald. Synopsis ↓
30US 30th	Harmony or SomethingUnis sont les hérissonsWritten by Ben Hurst and Pat Allee	FR 18 Apr 1999 US 8 Oct 1999	♪ “We’re All in This Together” The siblings rush to rescue a friend and the Oracle, and finally learn to work together. Synopsis ↓
31US 31st	Country CrisisSoscissionWritten by Laren Bright	FR 21 Apr 1999 US 11 Oct 1999	♪ “How You Play the Game” A feud between two groups of Freedom Fighters lets Robotnik build a dam that will flood the countryside. Synopsis ↓
32US 32nd	Haircraft in SpaceMinutes de coiffeurWritten by Tracy Berna	FR 25 Apr 1999 US 12 Oct 1999	♪ “Don’t Be a Backstabber” A robot hairdresser hypnotises customers into giving away secrets, and Sonia reveals the location of the base. Synopsis ↓
33US 33rd	HealerLe charlatanWritten by Ben Hurst and Pat Allee	FR 28 Apr 1999 US 13 Oct 1999	♪ “We’re the Sonic Underground” A self-styled scientist claims he can reverse roboticization, and Sonia wants to believe him. Synopsis ↓
34US 34th	Sonia’s ChoiceLe choix de SoniaWritten by Ben Hurst and Pat Allee	FR 2 May 1999 US 14 Oct 1999	♪ “Never Easy” With her brothers in two Roboticizers at opposite ends of the city, Sonia can only save one. Synopsis ↓
35US 35th	The Big Melt20000 lieues sous les glacesWritten by Len Janson	FR 5 May 1999 US 15 Oct 1999	♪ “Fun in the Sun” Robotnik plans to melt the polar ice caps, and Sonia is mistaken for a penguin queen. Synopsis ↓
36US 36th	SleepersAgent inhibeurWritten by Ben Hurst and Pat Allee	FR 9 May 1999 US 18 Oct 1999	♪ “Have It All Again” Robotnik’s sleep darts are capturing Freedom Fighters, including Cyrus’s father. Synopsis ↓
37US 37th	Bartleby the PrisonerMauvaises minesWritten by Elenor Burian-Mohr and Terence Taylor	FR 12 May 1999 US 19 Oct 1999	♪ “Justice Calling” Bartleby is put on trial for treason, and he would rather be roboticized than let Sonia walk into a trap. Synopsis ↓
38US 38th	The ART of DestructionLa musique adoucit les monstresWritten by Laren Bright	FR 16 May 1999 US 20 Oct 1999	♪ “The Sound of Freedom” Robotnik’s thinking robot ART is built to destroy, until it hears the band play. Synopsis ↓
39US 39th	The PendantAffaire pendanteWritten by Ben Hurst and Pat Allee	FR 19 May 1999 US 21 Oct 1999	♪ “Lady Liberty” A magic pendant starts turning Sonia invisible, and her brothers race to find its other half. Synopsis ↓
40US 40th	Virtual DangerLa réalité du virtuelWritten by Ben Hurst and Pat Allee	FR 23 May 1999 US 22 Oct 1999	♪ “Don’t Let Your Guard Down” Sonic and Manic get hooked on a virtual-reality game, and Robotnik traps them inside it. Synopsis ↓

French air dates are TF1’s, from Luke’s guide and Wikipedia; US air dates are the BKN Kids II run, from Luke’s guide, Wikipedia and Sonic Wiki Zone, which agree. Sonic Wiki Zone’s episode list sorts by US date and pairs the French dates with that order, which makes it disagree with Wikipedia’s French dates for 26 episodes; its individual episode pages agree with Wikipedia.

All 40 Episodes: Synopses

A full synopsis of every episode, written for Sonic Scene, in production order. Spoilers ahead, naturally. Each one links to the episode’s own page, where you can also watch it.

1Wedding Bell Blues

L’union fait la farce · France 6 January 1999 · US 4 October 1999 · ♪ “When Tomorrow Comes”

Robotnik stuns Mobius with the news that he is to marry Queen Aleena, a match that would make him king and the triplets’ stepfather. It smells like a trap, but Sonic, Sonia and Manic cannot ignore it. Their way in is Bartleby, Sonia’s posh old flame: while Manic quietly helps himself to the silverware, Sleet and Dingo turn up demanding a “wedding donation”, and Bartleby talks them into taking a band for the reception instead.

Playing their way into the palace, the siblings hunt for their mother, but Sonia is caught. Robotnik reveals the real scheme: with the Queen missing, he will have Sonia crowned in her place and then adopt her, which would make him king by the back door. Manic dresses up as Queen Aleena to cause a diversion, only to land in a cell, which he promptly picks his way out of.

Just as the ceremony is about to go through, a hooded woman appears on the balcony and tells the crowd that Queen Aleena has never abandoned her people. The nobles cheer, Robotnik fumes and Sonic snatches Sonia away in the chaos. Comparing notes afterwards, the three realise that none of them was on that balcony. Their mother really is alive.

Full episode page: key moments, trivia and the official video →

2To Catch a Queen

Échec à la reine · France 10 January 1999 · US 31 August 1999 · ♪ “Have You Got the 411?”

Argus, once captain of Queen Aleena’s personal guard, is racing to a secret meeting with his Queen when Sleet and Dingo shoot his hovercraft down and haul him off for Robotnik. Close by, the triplets find the wreck. Inside are his keys, his dog tags and an old photograph of the royal babies, which leaves Sonia cooing over how cute she used to be.

A man who knows where the Queen will be is now in Robotnik’s hands, so Sonic, Sonia and Manic set off to spring him before he is fed to the Roboticizer and before Robotnik can squeeze the meeting place out of him.

The chase leads through Robotnik’s defences and into a flooded cavern beneath the city, where fallen rocks block the way out and Swatbots open fire. The siblings turn the water against their pursuers, and Sleet and the Swatbots are swept off their feet while Dingo tries to carry his boss over the shallows. Doug Booth’s script ends with the villains bruised, soaked and squabbling.

Full episode page: key moments, trivia and the official video →

3Mobodoon

Mobourg-Latour · France 13 January 1999 · US 1 September 1999 · ♪ “I’ve Found My Home”

It is the triplets’ birthday, and a tip that the Queen may be in Mobodoon sends them through a blighted forest to find its portal, which opens only once every four years under a full moon. Sonia moans about the mud, one of the trees turns out to be Dingo in disguise, and the villains slip through the portal behind the heroes.

Mobodoon is a bright, festive town where nobody uses money and everyone shares. Mayor Whinnyham, an old friend of the Queen, leads Manic to a nursery with three cribs decorated with the siblings’ pictures. This is where they were born. Sonic grew up with a family and Sonia among the rich, but Manic was raised in the sewers of Robotropolis, and for the first time he feels at home. He announces that he is staying.

The homecoming party is cut short when Sleet and Dingo demand back taxes from a town with no money, then start carrying off its treasures, including the Power Stone that keeps Mobodoon alive. Once the villains are beaten, Manic changes his mind. Home, he decides, is wherever his brother and sister are, and the band needs its drummer.

Full episode page: key moments, trivia and the official video →

4The Price of Freedom

Course contre la montre · France 17 January 1999 · US 2 September 1999 · ♪ “Money Can’t Buy”

Fed up after a mud-spattered chase with Sleet and Dingo, Sonia drives to East Mobius for some pampering at the LaTour estate, home of her childhood best friend Mindy. Sonic and Manic follow after hearing that the Queen has been seen in the area. Mindy welcomes Sonia with a present: one of the fashionable new wristwatches that everyone seems to be wearing.

The watches are not what they seem. Each one is a spy device for the Robotnik Intelligence Agency, and they are made in a factory owned by Mindy’s father. Sonia finds out, and soon the estate is swarming with watch-robots programmed to catch the hedgehogs.

When the siblings confront the LaTours, Mr. LaTour realises what his deal with Robotnik has really bought and shuts the factory down, even though it means he and Mindy must give up everything and run. Sonic takes control of the spy robots with a remote and turns them on their masters, the LaTours escape, and Mindy says a tearful goodbye to her friend.

Full episode page: key moments, trivia and the official video →

5Underground Masquerade

Bal du duc · France 20 January 1999 · US 3 September 1999 · ♪ “Let the Good Times Roll”

Sleet and Dingo have a scheme of their own. They will collect the tribute the Duke of Velcronia owes Robotnik, keep it, and make sure somebody else takes the blame. Their chosen fall guy is Manic, who has just run into Max and the gang of young thieves he grew up with.

Manic’s reunion with his old crowd worries Sonic and Sonia, who fear their brother is sliding back into his thieving ways. The villains exploit the moment and steer Manic and his friends towards the crime, and when the money vanishes the Swatbot police know exactly whom to arrest.

Max proves a true friend: he catches the real culprits on tape. With a little help from a mysterious cloaked figure who has been watching from the shadows, the evidence comes out, Manic is cleared, the Duke keeps his money, and it is Sleet and Dingo who are handcuffed and marched away.

Full episode page: key moments, trivia and the official video →

6Tangled Webs

Holodrame · France 24 January 1999 · US 6 September 1999 · ♪ “Teach the Children, Light the Way”

Sonic is delighted to run into Cyrus, an old friend and gifted technician who appears to have joined the Resistance. What Sonic doesn’t know is that Robotnik has Cyrus’s father, and that Cyrus has been ordered to win the hedgehogs’ trust and lead them into a trap.

Cyrus plays his part, asking for help to free his father while quietly feeding the plan to Robotnik. But the mission takes him to the Freedom Fighters’ Sanctuary, and when he sees that it is a refuge for the Resistance’s children, he cannot go through with it. He destroys the communicator that links him to Robotnik.

With Cyrus on their side, the siblings turn the trap around. His little flying drones help wreck another of Robotnik’s Swatbot factories, and Sleet and Dingo end the day covered head to toe in flour. The episode closes with the hedgehogs gathering round a guilt-stricken Cyrus to talk about trust.

Full episode page: key moments, trivia and the official video →

7The Deepest Fear

Sans peur et sans romoches · France 27 January 1999 · US 7 September 1999 · ♪ “Face Your Fear”

In the harbour town of Port Mobius, ships keep disappearing, and the locals blame Moby Deep, a legendary sea monster. Captain Squeege tells the visitors the rest of the story: the frightened townspeople now pay Robotnik to protect them from the beast.

The protection racket smells fishy to the siblings, who suspect that Robotnik is sinking the ships himself. Proving it means going out to sea, and that is a problem for Sonic. The fastest hedgehog alive cannot swim and is terrified of water, and a stormy night-time run-in with something huge and tentacled does not help.

Sonic faces his fear, and the sinkings are traced to Robotnik’s submarine, which the band blasts out of the water. Sleet turns a soaked Dingo into a fish to make their getaway, only to find a real whale on their tails. Before the siblings leave town, they come across a monument sign bearing their mother’s name.

Full episode page: key moments, trivia and the official video →

8Who Do You Think You Are

Parfums d’Orient · France 31 January 1999 · US 8 September 1999 · ♪ “We Need to Be Free”

The prize this time is Queen Aleena’s royal journals, said to lie buried beneath a palace in the desert city of Tashistan. A stranger slips Manic a scroll that shows the way, and the camper van heads into the dust, much to Sonia’s disgust.

Things go wrong fast. A blow to the head in a scuffle wipes Sonia’s memory, and, with no idea who she is, she sells her power medallion to a trader in town. Rafi, a boy from the city’s resistance, takes the confused princess under his wing – until Sleet and Dingo grab the pair of them.

That leaves Sonic and Manic with a three-part job: win back the medallion, track down the journals and rescue a sister who no longer recognises them. Rafi is moments from the Roboticizer when Sonic runs rings around the machine until it breaks, and Sonia remembers herself in time to drive off with the scroll they came for.

Full episode page: key moments, trivia and the official video →

9The Last Resort

Comment résister ? · France 3 February 1999 · US 9 September 1999 · ♪ “Listen to Your Heart”

After escaping an ambush in an abandoned factory, where they were hunting for the Royal Seal of Mobius, the siblings drive into the hills and find Lake Valley Resort, a green haven untouched by Robotnik’s pollution. Its leader, Stripes, gives them a warm welcome and takes a particular shine to Sonia.

Sonic is suspicious, and he is right to be: the valley survives by keeping Robotnik happy. Stripes reports his guests to the dictator but mentions only Sonic and Manic, leaving Sonia out. When Manic lets slip that they are with the Resistance, the townsfolk turn on him. Stripes tells Sonia that dealing with Robotnik is the only way to survive; she disagrees, and tells him so in song.

Robotnik decides he doesn’t need Stripes any more and sends Sleet, Dingo and a fleet of machines to roboticize the whole valley. Sonia refuses to run, the siblings save Stripes, and the villagers fight back. When the hedgehogs leave, Stripes and his people have joined the Resistance. He asks Sonia to stay and fight beside him, but she chooses her brothers.

Full episode page: key moments, trivia and the official video →

10Come Out Wherever You Are

Bal explosif · France 7 February 1999 · US 10 September 1999 · ♪ “Society Girl”

With a nudge from Robotnik, Bartleby invites Sonia to make her society debut at a ball in one of her family’s old palaces, and she can think of nothing else. Unfortunately the night of the ball is also the night of a vital mission.

Robotnik’s new toy is the Predator, a giant aircraft built to hunt down and roboticize Resistance fighters wherever they hide. The siblings have until its “brain” goes in to take the ship over and plant a device that will cripple it. Daydreaming about the party, Sonia is caught halfway through the job, and Sonic has to help her concentrate. Once the Resistance has the craft, Sonia is chosen to lead its captured members to safety.

She still makes it to the ball. Afterwards a present arrives from her mother: the necklace Aleena wore at her own debutante ball, with a note explaining that she had always meant Sonia to wear it on her own big night, even if her mother could not be there to see it.

Full episode page: key moments, trivia and the official video →

11Winner Fakes All

Course d’obstacles · France 10 February 1999 · US 13 September 1999 · ♪ “Built for Speed”

Robotnik stages a grand track meet for the fastest athletes on Mobius and enters a super-fast racing robot of his own. The real point is bait: he is sure that Sonic will never turn down a test of speed.

Sonia and Manic know their brother’s competitive streak and beg him to sit this one out. When Sonic goes missing, they assume the worst and head to the stadium to drag him off the track, and walk straight into Robotnik’s net themselves.

Sonic, it turns out, kept his promise and never entered the race. Instead he faces a much tougher one: rescuing his brother and sister. Along the way he pushes a runaway Truckbot through a line of Swatbots, gets a laser pistol in the face from Sleet, who has been hiding in a pram, and spin-dashes through robots to get everyone out.

Full episode page: key moments, trivia and the official video →

12A Hedgehog’s Home Is Her Castle

La vie de château · France 14 February 1999 · US 14 September 1999 · ♪ “Let’s Do It to It”

Exploring the sewers, Manic glimpses what looks like Queen Aleena, who drops a letter as she hurries away. It is an invitation for Sonia to claim Worst Castle, left to her by a cousin called Albert. Sonia is thrilled at the idea of a castle headquarters and sets off with Manic; Sonic decides to sit this one out. The “Queen” was Dingo in disguise, and cousin Albert does not exist.

Worst Castle lives up to its name, with creepy rooms, creatures in the beds and a nervous bat caretaker named Belok and his owl, Hooter. Sonia keeps catching sight of her mother, and the mirror in her room turns out to be a doorway to somewhere else. Sonic, arriving later in new anti-gravity shoes, is nearly flattened by a falling chandelier.

Belok confesses that Sleet forced him to help by threatening to eat Hooter, and warns that a missile strike is on its way. Sonic finds Sonia lost inside the mirror world, and the hedgehogs and Belok escape through it as the castle is destroyed. What Manic took for a dream, his mother’s touch in the night, was real: Aleena was there, watching her children with tears in her eyes.

Full episode page: key moments, trivia and the official video →

13Artifact

Objet de voleur · France 17 February 1999 · US 15 September 1999 · ♪ “You Can’t Own Everything”

Disguised as waiters at one of Robotnik’s society parties, the siblings hear him announce that the lost city of Mobu Pinchu is real, then auction two priceless “artifacts” from it to pay for more Swatbots. Sonic wrecks the sale, and the hedgehogs escape with both pieces.

Sonia and Sonic take theirs to Professor Fuddle at Mobius University, who finds that it is not ancient treasure at all but a bomb from a war only five hundred years ago. Manic, meanwhile, has sold the other one to a shady dealer called Vince to raise money for the Resistance, and it is a bomb too, with twelve minutes on the clock.

Vince has already sold it on to Bartleby, so the siblings race to his mansion with Sleet and Dingo in pursuit, then head for the real Mobu Pinchu to stop Robotnik’s dig. There Manic is tempted by the treasure, but a “QA” mark on the floor shows that their mother has been guarding it for the people of Mobius. Unseen, she watches them from a clifftop.

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14Bug!

Robestioles · France 21 February 1999 · US 16 September 1999 · ♪ “Never Give Up”

Manic is out thermal-surfing alone when a giant Stealthbot ambushes him. Sonic arrives just in time and scolds his brother for breaking the rule about never going out solo. A radio message from the wrecked robot says Queen Aleena has been seen in Quadrant 10, a bleak wasteland.

There the siblings meet Rudy, a leather-clad lizard and local Freedom Fighter whose village has been burned and whose comrades turned on him after a swarm of glowing orange bugs passed by. The bugs are tiny Robotnik machines that inject a mind-control serum. Ignoring Sonic’s orders, Manic goes bug-hunting on his own, is stung on the nose and flies off to report to Robotnik.

Sonic and Sonia must get their brother back and stop the swarm before it enslaves the whole Resistance. Sonic lures the bugs into a lightning storm, getting struck himself more than once, while the van’s cannons deal with the rest. Back at the burned village, some of Rudy’s friends, including Sheila, emerge alive.

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15Sonic Tonic

Tonisonic · France 24 February 1999 · US 17 September 1999 · ♪ “The Fastest Thing Alive” (also listed as “I Wish I Could Go Faster”)

Robotnik’s tree-cutters invade the Hanging Gardens, a refuge Queen Aleena created for her children, looking for the fabled Velocitree, the fastest-growing plant on Mobius. Distilled in his mobile lab, its essence becomes Sonic Tonic, a yellow brew that gives anyone Sonic’s speed, as Dingo and then Sleet find out.

Sonic forbids his siblings to touch the stuff, which goes down badly: behind his back, Sonia and Manic grumble that being the fastest does not make him the leader. Sonic is captured in Robotropolis, but then the tonic’s side effects kick in. Sleet and Dingo’s feet swell until they burst out of their shoes, and Sonic escapes with the potion.

When the van gets a flat and Sonic leaves them to change it, Sonia and Manic drink some tonic and suffer the same giant-foot fate. Sonic sorts things out and pours the tonic over the gardens, which spring back to life and tie the villains up in greenery. On the road home the siblings apologise to each other, and laugh at how slowly they are suddenly going.

Full episode page: key moments, trivia and the official video →

16Friend or Foe?

L’île d’émeraude · France 28 February 1999 · US 20 September 1999 · ♪ “Not Always What They Seem”

Following a lead on their mother, the siblings travel to the Floating Island, which is held in the sky by a Chaos Emerald. Sleet and Dingo are after the same gem, and they reach the island’s guardian first.

Knuckles is a proud echidna who has filled his home with traps, and the villains have told him that the hedgehogs are thieves coming for the Emerald. He jumps to conclusions and takes on Sonic, and while the two of them brawl, Sleet and Dingo go for the prize.

Knuckles works out in time who the real thieves are, the hedgehogs convince him that they mean his island no harm, and together they protect the Emerald. It is the start of a wary friendship that matters a great deal later in the series.

Full episode page: key moments, trivia and the official video →

17Head Games

Réserve surnaturelle · France 3 March 1999 · US 21 September 1999 · ♪ “Take a Chance”

Sonic’s bag of chili dogs comes with a message from his mother: the siblings are needed on Speedster Island. They arrive to find an ancient sanctuary whose people honour giant stone heads, and whose fishing is failing because Sleet and Dingo are frightening off the fish to drive the islanders out.

Behind the scheme is Bartleby, who wants to turn the island into a luxury resort for the rich, with Sleet and Dingo pretending to help him. Robotnik has other plans. Dingo, disguised as an armchair, catches Sonic, and the villains break every promise they made to Bartleby and the islanders.

Manic notices musical symbols on the necks of the island’s statues, which look a lot like hedgehogs. Played together, the siblings’ medallions bring the stone guardians to life, and the giants drive Robotnik’s forces off the island. Bartleby is left to see what his deal has done.

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18When in Rome…

Vouloir c’est pouvoir · France 7 March 1999 · US 22 September 1999 · ♪ “Where There’s a Will, There’s a Way”

Tired and wondering whether their fight will ever end, the siblings visit the Oracle of Delphius for guidance. He makes them a deal: complete one more mission and he will show them their future.

The mission drops them into an alternate world in the style of ancient Rome, ruled by an emperor who looks remarkably like Sleet, and their power medallions are gone. With no guitar, keyboard or drums to fall back on, Sonic, Sonia and Manic have to rely on their own speed, strength, wits and nerve to free its people.

Their win ends with cheering crowds and a new emperor, and a beam of light carries the hedgehogs back to the Oracle. He keeps his word and shows them a vision of the siblings reunited with their mother, until Robotnik appears in it too: the future is not settled yet.

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19The Jewel in the Crown

Mission diadème · France 10 March 1999 · US 23 September 1999 · ♪ “The Cosmic Dance”

Word spreads that a jewel from Queen Aleena’s crown, which glows brighter the closer it gets to her, is in the hands of a merchant. Robotnik wants it to track the Queen down; the siblings want it to find their mother and keep her safe.

Dodging Robotnik’s sneaky Snooper robot, the hedgehogs get the jewel first, and its light grows stronger as they travel. Their hopes rise with it, until it leads them into a trap. The jewel was a decoy all along, planted to lure Robotnik.

Sleet and Dingo end up hanging together, dripping with honey, and the jewel shatters on the floor. The merchant has gone, but behind a cloth the siblings find a portrait of their mother, and as they drive away, Aleena herself watches them from outside.

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20Three Hedgehogs and a Baby

BB AJT · France 14 March 1999 · US 24 September 1999 · ♪ “Being a Kid Is Cool”

While investigating Robotnik’s new micro-Roboticizer, the siblings find a baby hedgehog abandoned in an alley. Unable to trace its parents, they leave Manic on babysitting duty, much to his disgust.

Manic soon finds that the baby loves music and flying, nicknames it “Hip” and becomes very attached. When the others suggest a shelter, he insists that the safest place is Sanctuary, the secret refuge for the Resistance’s children, and sets off to take Hip there alone. Sonic and Sonia learn the truth too late: the micro-Roboticizer was a distraction, and Hip is a spy robot built to lead Robotnik straight to Sanctuary.

Sonic and Sonia race after Manic with Sleet’s fleet on their tail. In the struggle Hip falls and smashes, and Manic is heartbroken to find that the baby he loved was a machine. The siblings beat off the fleet and keep Sanctuary hidden, and Manic later visits the real children there to teach them about rhythm.

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21Dunes Day

Nomade’s Land · France 17 March 1999 · US 27 September 1999 · ♪ “True Blue Friend”

The siblings head for the deserts on the edge of Mobius, hoping to win a nomad tribe over to the Resistance, and their van breaks down on the way. The tribesmen rescue them and bring them back to camp, where their leader, Ifyoucan, makes them welcome.

Manic doesn’t trust the chief and goes looking for the truth. He finds it: Ifyoucan has been roboticized, a secret that would get him banished if his people found out. Before Manic can tell anyone, he is captured and carried off, and no one at the camp notices that he has gone.

Sonic and Sonia work out why their brother has vanished and race across the dunes to reach him in time. The episode’s song, “True Blue Friend”, sums up what is at stake: loyalty between people who do not always see eye to eye, and between a tribe and a leader with something to hide.

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22Mummy Dearest

Le parchemin · France 21 March 1999 · US 28 September 1999 · ♪ “Mummy Wrap”

Hidden inside hollowed-out Swatbots, the siblings stroll into Robotnik’s headquarters and crack his safe to recover the Hedgehog Crest, a book about their family’s royal line.

The book points to a scroll hidden in a temple deep in the dangerous Mobian desert, said to hold prophecies of Robotnik’s defeat. Sonic leads the way into the well-guarded pyramid, with Sleet, Dingo and the Swatbots close behind.

In the inner chamber they wake Aman-Rapi, an ancient royal mummy and an ancestor of theirs, who will hand over the scroll only in exchange for a song. The band obliges, Aman-Rapi vanishes in a blaze of light, and Robotnik’s troops are left frozen outside, to the siblings’ great amusement. Back at base, Sonia opens the case and the ancient scroll crumbles to dust in her hands.

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23Hedgehog in the Iron Mask

Mascarade · France 24 March 1999 · US 29 September 1999 · ♪ “Part of the Problem”

Their search for their mother takes the siblings to a prison tower, where they free a masked prisoner who claims to be family: Queen Aleena’s twin brother, and so their uncle.

The stranger is bait in another of Robotnik’s schemes. He stirs up an argument over which of the three should take the throne once Robotnik is gone, and the bickering breaks the band apart, leaving each sibling alone and vulnerable.

Trapped inside the same prison walls that once held their mother, the siblings have to patch things up and work as a team again to break out. The song, “Part of the Problem”, spells out the lesson: squabbling over power is exactly what Robotnik wants. Bob Forward’s script builds the whole episode around the question every royal family faces sooner or later: who gets the crown?

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24Six Is a Crowd

Monde parallèle · France 28 March 1999 · US 30 September 1999 · ♪ “I Can Do That for You”

The Oracle of Delphius sends the siblings into another dimension, where they find a gleaming city full of bowing citizens and statues of themselves. The local Freedom Fighters capture them at once and take them to their leader: Robotnik.

In this world everything is reversed. Robotnik is the hero, and the hedgehogs’ doubles are selfish rulers: an overfed King Sonic, a tax-mad King Manic and a cruel Queen Sonia who jails whole families, and none of them plays music any more. When the rebels see that their prisoners are different, the band proves it with a song.

Disguised as themselves, the heroes slip into the palace and take on their doubles. Sonic beats his in a fair race, Manic vacuums up his twin’s loot and Sonia fools hers with a fake mirror. Then they show the rulers what their greed has done. On the way home Sonia hears her mother’s voice, warning that power can corrupt anyone.

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25Flying Fortress

La forteresse volante · France 31 March 1999 · US 1 October 1999 · ♪ “No One Is an Island”

A holiday is cut short when Robotnik unveils his newest weapon, a Flying Fortress that can lay waste to Mobius from the sky. Sonic gets on board and tries to bring it down by pulling out its reactor, without success.

Suspecting that the fortress is powered by a Chaos Emerald, Sonic heads for the Floating Island to ask Knuckles for help. The guardian agrees, despite his fear of leaving his island unprotected, and together they hunt through the fortress for its power source.

Sleet and Dingo get there first and make off with the Emerald, and without it the fortress drops out of the sky into the sea, with the heroes still on board. The story continues in No Hedgehog Is an Island.

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26Beginnings

On reprend au début · France 4 April 1999 · US 30 August 1999 · ♪ “Someday”

Three hedgehogs grow up without knowing the others exist. Sonia has piano lessons and fine manners in the house of the wealthy Lady Windermere; Manic, snatched from his doorstep as a baby, learns to pick pockets from the thief Farrell; and Sonic is raised by Bernie and Estelle until the Swatbots come for them and his Uncle Chuck takes him in.

The reason is a prophecy. Queen Aleena had just given birth to the triplets when Robotnik seized Mobotropolis, renamed it Robotropolis and outlawed the royal family, and the Oracle of Delphius told her that she and her children would one day defeat him as the Council of Four – if she let them go. So she left each baby on a different doorstep.

Years later Sonic is blowing up Robotnik’s factories for the Resistance, and the doctor hires the bounty hunters Sleet and Dingo to find the saboteur. The Oracle tells Sonic he is a prince with a brother and sister to find, guided by the song in his heart; his glowing medallion leads him to them, but their guardians are roboticized before they can be saved. The Oracle hands the reunited three a map, and the journey begins.

Full episode page: key moments, trivia and the official video →

27No Hedgehog Is an Island

Dur comme la pierre · France 7 April 1999 · US 5 October 1999 · ♪ “Learn to Overcome”

As the Flying Fortress breaks apart, Sleet and Dingo escape with the Chaos Emerald, Robotnik ejects to safety, and the siblings and Knuckles are left to fight their way out of the wreck.

Squabbling over who gets to use the Emerald, Sleet and Dingo drop it and it splits in two. Its chaos energy pours out, setting off earthquakes and disasters across Mobius. Knuckles takes the hedgehogs to his great-grandfather, Athair, for advice.

Athair’s answer is hard to swallow: the only way to save the planet is to make a deal with Robotnik. The siblings shoot their way past a Swatbot ambush and escape in their camper van, but too late they realise that Knuckles has been left behind, holding a glowing canister, and Sleet has spotted him. The story concludes in New Echidna in Town.

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28Getting to Know You

S’entraîner à s’entraider · France 11 April 1999 · US 6 October 1999 · ♪ “Working Together in Harmony”

Picking up straight after Beginnings, this is the siblings’ training montage – with interruptions. Before they can even set off on the Oracle’s map, Sleet and Dingo are at the door. Sonic and Manic deal with a robot, Sonia locks a lovestruck Dingo in the basement, and the three slip away through the sewers (Sonia is not amused). When the map is lost, her photographic memory gets them there anyway.

Their first teacher, Gondar, is a mountain of muscle who lives in the forest. Under him Sonic works on speed, control and his spin attack, Sonia learns a spin of her own and martial arts, and Manic, who has no natural power, turns his drumsticks into throwing weapons. Even the forest pitches in, spitting sticky goo from giant flowers to drive off Sleet and Dingo’s ship.

A magic scroll then sends the trio to Thelonious, a monk in a floating temple, whose first test – a monster in a simulation – they fail badly. He blames their lack of teamwork, Sonic’s impatience above all, but when Sonia and Manic stick up for their brother, the monk sees the start of something. The lesson continues in Harmony or Something.

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29New Echidna in Town

Dur, Dur-Dur · France 14 April 1999 · US 7 October 1999 · ♪ “The Mobius Stomp”

Knuckles strikes a bargain with Robotnik: help find and contain the Chaos Emerald before its energy destroys Mobius, and Robotnik’s empire with it. The price is the Sonic Underground. Knuckles agrees only after Robotnik promises to keep the hedgehogs as prisoners rather than roboticize them.

Robotnik lies, of course, and a guilt-ridden Knuckles frees his friends before the Roboticizer can do its work. But a bigger problem has arrived: Dingo has swallowed the Emerald and turned into Chaos Dingo, a monster rampaging across the planet.

Hedgehogs, echidna and dictator are forced into an uneasy team-up to stop him before Mobius is lost. Knuckles clearly has a soft spot for Sonia, and selling her out weighs on him more than anything.

Full episode page: key moments, trivia and the official video →

30Harmony or Something

Unis sont les hérissons · France 18 April 1999 · US 8 October 1999 · ♪ “We’re All in This Together”

The siblings are still struggling with Thelonious’s lessons in harmony – the key to their medallions’ full power – when a vision interrupts: Trevor, a friend from the Resistance, has been captured. Against the monk’s advice, they rush home.

Back in Robotropolis, Manic’s thieving know-how gets them into Robotnik’s citadel through secret tunnels, where they glimpse Bartleby being grilled about Sonia. They free Trevor and learn that Sleet and Dingo have gone after the Oracle; Robotnik, shown footage of the siblings in training, is sure the Oracle is behind them. Trevor creates a diversion while the three steal a ship, and when Robotnik triggers its self-destruct, an override key Manic pocketed earlier gets them out.

The trip to the Oracle’s cave turns into a shouting match until a vision of their mother tells them to stop blaming each other and pull together. They do, and Manic’s earth-cracking drums shake Sleet, Dingo and the robots out of the cave. Afterwards Aleena and the Oracle reveal that the Oracle was never in danger: the rescue was the siblings’ final lesson.

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31Country Crisis

Soscission · France 21 April 1999 · US 11 October 1999 · ♪ “How You Play the Game”

Back at base after a bombing raid on Robotropolis, the siblings find a glowing note from Queen Aleena. Robotnik is putting up a hydroelectric dam in the south of Mobius, and getting away with it because two groups of Freedom Fighters, the Valley Folk and the Mountain Folk, are too busy feuding to stop him.

To win the Valley Folk’s trust, Sonic races their fastest runner, Jarod, stopping to smell a flower before scorching past him. The feud, Jarod explains, began when the Mountain Folk lost their half of a gold medallion the Queen gave both groups and accused the valley of stealing it. A huge Guardian Bot protects the dam, so the hedgehogs need both sides, but Granny, the Mountain Folk’s leader, refuses to make peace. Sleet and Dingo, meanwhile, plan to capture the hedgehogs and sell them to Robotnik themselves.

The missing medallion turns up: Granny had tucked it away for safekeeping while dancing with Zeb of the Valley Folk. The two sides unite against the dam, and the medallion halves, put together, form a map left by Aleena.

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32Haircraft in Space

Minutes de coiffeur · France 25 April 1999 · US 12 October 1999 · ♪ “Don’t Be a Backstabber”

Robotropolis has a fashionable new salon, and its stylist, the robot DooBot, has a secret talent: she hypnotises her customers into spilling their deepest secrets while she does their hair. It is Robotnik’s latest way of rooting out the Resistance.

Sonia cannot resist a makeover. Under DooBot’s spell she gives away the location of the siblings’ new hideout, and every word goes onto a recording. It is the perfect trap for a hedgehog who was raised as an aristocrat and has missed being pampered.

When the hedgehogs learn that DooBot carries a recording device, the race is on to grab the tape before it reaches Robotnik and their base is exposed. The episode’s song, “Don’t Be a Backstabber”, takes aim at betrayal, which is what the friendly salon turns out to be.

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33Healer

Le charlatan · France 28 April 1999 · US 13 October 1999 · ♪ “We’re the Sonic Underground”

A self-styled scientist called Titus arrives in Robotropolis with the De-Roboticizer, a machine he says can reverse roboticization. In a city full of roboticized friends and family, it sounds like a miracle. At a public demonstration Sonia sees a chance to restore someone she loves.

Sonic thinks it is a con and starts digging. Robotnik kidnaps Titus, makes him admit that his machine is a fake, and offers to spare him on one condition: the “healer” must use his device as a Roboticizer instead.

Sonic uncovers the deal just as Sonia is about to step into the machine, and pulls her out before she becomes Robotnik’s next victim. The band’s song for the episode is named after the band itself: “We’re the Sonic Underground”.

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34Sonia’s Choice

Le choix de Sonia · France 2 May 1999 · US 14 October 1999 · ♪ “Never Easy”

Robotnik puts the royal family’s goblets on show, knowing the siblings will want them back. They expect a trap and plan around it, but the mission falls apart and Sonic and Manic are captured.

Robotnik puts each brother in a Roboticizer at opposite ends of the city and tells Sonia she has time to save only one. With help from Renée, a fox who leads the local Freedom Fighters, she chooses Sonic, reasoning that his speed gives them a chance to reach Manic too.

They arrive as Robotnik starts the machine, but it has been quietly sabotaged by Queen Aleena, who flies away before her children can reach her. Manic is safe, and the three raise the recovered goblets in a toast to their mother.

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35The Big Melt

20000 lieues sous les glaces · France 5 May 1999 · US 15 October 1999 · ♪ “Fun in the Sun”

The siblings are enjoying a beach holiday, Sonic on a sunbed and Manic on a surfboard, when the Polar Resistance brings bad news: Robotnik has a new weapon in the Arctic.

In the frozen north they find a giant submarine that melts the ice from under their feet. Robotnik plans to melt the polar caps and flood the planet. Separated from her brothers, Sonia is taken for “Queen Sauna” by a colony of penguins with troubles of their own.

The hedgehogs track the submarine to its base inside an iceberg and blow up Robotnik’s ice-bound factory before Mobius ends up underwater. The episode ends where it began, on holiday, with Sonia relaxing in a sauna with her penguin friends and Manic cannonballing off a cliff.

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36Sleepers

Agent inhibeur · France 9 May 1999 · US 18 October 1999 · ♪ “Have It All Again”

On a mission in a distant sector, the siblings learn that Freedom Fighters have been disappearing. Sonic races to help but is too late: a group of them, including Cyrus’s father, have already been roboticized after being knocked out by Robotnik’s newest weapon, the Sleeper.

The Sleeper darts put victims to sleep so they can be collected at leisure, and when Manic is hit, the hunt for their source becomes personal. With Cyrus at their side, the hedgehogs trace the darts’ fuel to a mine in the Badlands.

Sonia’s spinning tornado flings a supply ship across the sky, Sonic snatches a nugget of the precious ore from Sleet and tosses it up for Sonia to blast, and Manic’s drums split the ground open, destroying the mine as Robotnik’s ship blasts off.

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37Bartleby the Prisoner

Mauvaises mines · France 12 May 1999 · US 19 October 1999 · ♪ “Justice Calling”

Bartleby, the mink Sonia was once meant to marry, finally gets his hero moment. Robotnik has him charged with treason and convicted in a show trial – a trial that is really bait for Sonia and her brothers. When Bartleby works that out, he would rather be roboticized than see her caught, and begs her to stay away.

Sonia cannot stay away, but first there is a job to do. The siblings have orders to blow up a ruby mine whose stones are good enough to drive titanium-cutting lasers.

With the mine in pieces, Sonia races to the rescue, but Sonic’s speed gets him and Manic there first, and they spring Bartleby from his cell. He and Sonia say goodbye at an airport, and the pompous mink leaves as one of the show’s real heroes.

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38The ART of Destruction

La musique adoucit les monstres · France 16 May 1999 · US 20 October 1999 · ♪ “The Sound of Freedom”

Robotropolis has a new policy, eradication, and a new enforcer to carry it out: ART (Artificial Robot Thought Technology), a giant robot with a mind of its own that learns as it goes, built to destroy everything in its path, the Sonic Underground included.

ART seems unstoppable until it hears the siblings rehearsing for a concert. The music calms its circuits, and as it learns about friendship it changes sides. In quieter moments the hedgehogs admit to their new friend that they are losing hope of ever finding their mother.

Sleet sees a chance to finish off ART and the hedgehogs together, even using a hologram of Queen Aleena as bait. ART ends up sacrificing itself, and the siblings watch the destruction from a distance.

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39The Pendant

Affaire pendante · France 19 May 1999 · US 21 October 1999 · ♪ “Lady Liberty”

Robotnik wants to clear the newly discovered Emerald Peninsula and put its people to work as slaves. Looking for a way to stop him, the siblings consult a fortune teller called Maeve, who tells Sonia about a magic pendant that could hold the answer.

Sonia finds one half of the pendant, but it starts to turn her invisible. While Sleet uses his remote to turn Dingo into a bog beast, Sonic and Manic race to find the other half before their sister fades away for good.

Manic grabs the missing piece, the two halves release a burst of light, and Maeve reveals her true form as a fairy. She traps Sleet and Dingo in a pink whirlwind, hands the restored pendant to Sonia, and Robotnik ends up flat on his back.

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40Virtual Danger

La réalité du virtuel · France 23 May 1999 · US 22 October 1999 · ♪ “Don’t Let Your Guard Down”

Castle Conquest is the new obsession – or rather Sonic and Manic’s, who insist the virtual-reality game is improving their piloting. Sonia is not convinced and Cyrus needs them sharp for a mission, but the practice pays off when the brothers intercept one of Robotnik’s supply ships.

Their next session brings a new opponent, Destructo, who claims to have written the game and offers the brothers a couple of upgrades. The second one is the hook. Destructo is Robotnik in disguise, and the downloads lock Sonic and Manic inside the game, where losing now means more than losing a life.

It falls to Sonia, the sibling who never cared for the game, to plug in and play her way through it to bring her brothers home. It is the last episode of the series, and Queen Aleena is still out there.

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Broadcast & Air Dates

Sonic Underground was a French–American co-production, and France saw it first: TF1 premiered it on 6 January 1999 and showed all 40 episodes by 23 May, in the production order used on this page.

The English version reached the UK on 2 May 1999 on ITV’s GMTV strand, but only the first 18 episodes were shown before the series left the schedule. American viewers waited until 30 August 1999, when the syndicated BKN Kids II block launched with Beginnings and then ran an episode every weekday until 22 October. Re-runs followed on the Sci-Fi Channel, the DIC Kids Network and, in 2012, Disney XD.

Country	Channel	First run	Notes
France	TF1	6 January – 23 May 1999	World premiere, starting with Wedding Bell Blues
United Kingdom	ITV (GMTV)	From 2 May 1999	First 18 episodes only; later on ITV2 (2005), Pop and Kix!
United States	BKN Kids II (syndication)	30 August – 22 October 1999	Weekday mornings; opened with Beginnings
United States	Sci-Fi Channel	From October 1999	Only 32 of the 40 episodes aired: Friday slots went to other shows
United States	DIC Kids Network	2004	Re-runs in syndication
United States	Disney XD	11 June – 14 December 2012	Re-runs
Canada	Télétoon	1999–2000	Listed by Sonic Retro

Sources: Wikipedia and its cited references (Sonic Power Zone mailing-list posts, epguides, the DIC Kids Network site and a Disney XD listing), Sonic Retro and Luke’s original guide.

DVDs & Where to Watch

The easiest way to watch is free: WildBrain, which owns the old DiC library, has put every episode on YouTube, and each episode page here embeds the official upload.

On DVD, Shout! Factory released the whole series in North America in two 20-episode volumes, each with a bonus CD of eight songs. NCircle Entertainment later issued single discs and, in 2023, a four-disc complete series.

Sonic Underground: Volume 2Shout! Factory, 2008

Release	Label and date	Contents
Sonic Underground: Volume 1	Shout! Factory / Vivendi · 18 December 2007	20 episodes on three discs; interviews with Robby London and Mike Piccirillo, an opening-titles animatic and concept art; bonus audio CD with eight songs, including the theme
Sonic Underground: Volume 2	Shout! Factory / Vivendi · 17 June 2008	The other 20 episodes and a second eight-song CD
Single-disc DVDs	NCircle Entertainment · 2007–2010	Four episodes each: The Queen Aleena Chronicles, Sonic to the Rescue, Secrets of the Chaos Emerald, Ready, Aim, Sonic!, Legend Has It and Band on the Run
Sonic Underground: The Complete Series	NCircle Entertainment · 25 July 2023	All 40 episodes on four discs
UK DVDs	Anchor Bay · 2004	Individual volumes from 31 May 2004, then a ten-disc box set in October 2004

Sources: Wikipedia and its cited store listings (Shout! Factory 2007, NCircle 2023, Anchor Bay 2004, via the Wayback Machine). Cover via Sonic Wiki Zone. Streaming line-ups change often; the YouTube uploads were checked on 6 November 2026.

Trivia

Every one of the 40 episodes has its own song; the full list, with the singers, is on the series page.
Three writers from SatAM wrote 19 episodes between them: Ben Hurst and Pat Allee (13, always as a pair) and Len Janson (6).
Episodes 25 to 30 alternate between two three-part stories: the Chaos Emerald trilogy (25, 27, 29) and the Origins trilogy (26, 28, 30).
The US run used 40 weekday mornings in a row, five a week for eight weeks, so the whole series aired in under two months.
In France the show is called Sonic le Rebelle (“Sonic the Rebel”), and every episode has its own French title, often a pun; they are listed with each synopsis.
Luke’s original table labelled its two date columns “Intl” and “France”. The “Intl” dates are the US premiere dates.

Sources

Facts on this page were checked against these sources in November 2026. Where they disagree we say so.

Luke’s original Sonic Scene guide to Sonic Underground (2017): all 40 titles, songs, writers and US and French air dates.
Wikipedia: Sonic Underground: episode list with French titles and production numbers, broadcast, cast and home-media sections, and the references they cite.
Sonic Wiki Zone: List of Sonic Underground episodes and the individual episode pages (plots, songs, galleries, transcripts).
Sonic Retro: Sonic Underground (Wayback copy, December 2024): air dates, voice actors, syndication and official uploads.
epguides: Sonic Underground (Wayback copy, 2000): the Sci-Fi Channel run.
DIC Entertainment: DIC Kids Network programmes (Wayback copy, 2004).
Disney Movies List: Sonic Underground on Disney XD (Wayback copy).
Shout! Factory store: Sonic Underground Volume 1 (Wayback copy, December 2007).
NCircle Entertainment: Sonic Underground – The Complete Series (Wayback copy, 2023).
Anchor Bay UK: Sonic Underground box set (Wayback copy, 2004).
WildBrain’s official YouTube uploads: Sonic The Hedgehog – WildBrain and WildBrain Hero Tower (episode numbers 101–140; checked 6 November 2026).
Title cards, screenshots, storyboards and character art: Sonic Wiki Zone galleries, copied to the Sonic Scene media library.

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Part of our Sonic Underground guide: the series page covers the characters, the songs, the prophecy, the voice cast and the show’s history.