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| Series | Sonic Underground (DiC, 1999) |
| Season | Season 1 (the only season) |
| Episode | Episode 30 of 40 (production order) · production no. 430 · WildBrain no. 130 |
| French title | Unis sont les hérissons |
| First aired (France) | 18 April 1999 · TF1 |
| First aired (US) | 8 October 1999 · BKN Kids II (syndication) · 30th in US broadcast order |
| Written by | Ben Hurst and Pat Allee |
| Directed by | Marc Boreal, François Hemmen and Daniel Sarriet; Tom Smith (US) |
| Song | “We’re All in This Together” |
| Story arc | Origins trilogy, part 3 of 3 (after Beginnings and Getting to Know You) |
| Previous episode | New Echidna in Town (S01E29) |
| Next episode | Country Crisis (S01E31) |
Origins trilogy 3/3TrevorThe Oracle in danger
Harmony or Something is episode 30 of Sonic Underground, DiC’s 1999 cartoon about Sonic, Sonia and Manic, the hedgehog triplets of Queen Aleena. It is number 30 in production order – the order TF1 first showed the series in France, where it premiered on 18 April 1999 – and it was the 30th episode to air in the United States, on 8 October 1999. It was written by Ben Hurst and Pat Allee, and its song is “We’re All in This Together”.
Synopsis
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.
The Song: “We’re All in This Together”
“We’re All in This Together” arrives once the siblings stop blaming each other, the moment the trilogy has been building to.
Key Moments
- Manic’s thieving skills get the team into Robotnik’s citadel.
- Queen Aleena appears in a vision to her squabbling children.
- The Oracle’s danger turns out to be a test.
Trivia
- The French title, Unis sont les hérissons, means “united are the hedgehogs”.
- WildBrain’s upload is titled “Harmony of Something”.
- Ends the Origins trilogy that begins with Beginnings.
Watch the Episode
The full episode, uploaded by WildBrain’s official Sonic The Hedgehog – WildBrain YouTube channel (checked 6 November 2026).
Part of our Sonic Underground episode guide. The series page covers the characters, the songs, the prophecy and the show’s history.
Sources: titles, writers, songs and air dates from Luke’s original Sonic Scene guide, cross-checked with Wikipedia, Sonic Wiki Zone and Sonic Retro (Wayback copy); synopsis written for Sonic Scene from the episode, its official description and several fan references; title card and screenshots via Sonic Wiki Zone, copied to our media library.