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| Series | Sonic Underground (DiC, 1999) |
| Season | Season 1 (the only season) |
| Episode | Episode 7 of 40 (production order) · production no. 408 · WildBrain no. 107 |
| French title | Sans peur et sans romoches |
| First aired (France) | 27 January 1999 · TF1 |
| First aired (US) | 7 September 1999 · BKN Kids II (syndication) · 7th in US broadcast order |
| Written by | Michael Edens and Mark Edens |
| Directed by | Marc Boreal, François Hemmen and Daniel Sarriet; Tom Smith (US) |
| Song | “Face Your Fear” |
| Previous episode | Tangled Webs (S01E06) |
| Next episode | Who Do You Think You Are (S01E08) |
Sonic’s fear of waterPort MobiusMoby Deep
The Deepest Fear is episode 7 of Sonic Underground, DiC’s 1999 cartoon about Sonic, Sonia and Manic, the hedgehog triplets of Queen Aleena. It is number 7 in production order – the order TF1 first showed the series in France, where it premiered on 27 January 1999 – and it was the seventh episode to air in the United States, on 7 September 1999. It was written by Michael Edens and Mark Edens, and its song is “Face Your Fear”.
Synopsis
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.
The Song: “Face Your Fear”
“Face Your Fear” spells out the lesson Sonic has to learn before he can head out to sea.
Key Moments
- Sonic admits his fear of water.
- Robotnik’s “protection” turns out to be a racket.
- The siblings find a Queen Aleena monument sign.
Trivia
- Production number 408: this and Who Do You Think You Are (407) swap places in most episode lists, including Luke’s.
- Michael Edens and Mark Edens share the writing credit here; between them they wrote ten more episodes.
- Sonic’s fear of water echoes the classic games, where underwater stages come with a drowning countdown.
Watch the Episode
The full episode, uploaded by WildBrain’s official WildBrain Hero Tower 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.