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| Series | Sonic the Hedgehog (“SatAM”), ABC |
| Season | Season 2 (1994) |
| Episode | Season 2, episode 13 (guide and DVD order) · aired 13th · WildBrain no. 213 |
| First aired (US) | 3 December 1994 · ABC · series finale |
| Written by | Ben Hurst |
| Directed by | Ron Myrick |
| Story editor | Len Janson; associate story editors Ben Hurst and Pat Allee |
| Opening theme | “Sonic the Hedgehog” main title – Noisy Neighbors Productions |
| Previous episode | Spyhog (S02E12) |
| Next episode | – (series finale; why there was no Season 3) |
Series finaleDeep Power StonesCliffhanger
The Doomsday Project is episode 13 of Season 2 of Sonic the Hedgehog, the ABC cartoon fans call SatAM, in the order of our original episode guide and the Shout! Factory DVDs. It was the thirteenth Season 2 episode to air, on 3 December 1994, and the last new episode of the series. It was written by Ben Hurst and directed by Ron Myrick.
Synopsis

A Doomsday pod crashes down in Knothole, and Sonic and Sally realise that Robotnik’s ultimate weapon is already running, ahead of schedule. The Freedom Fighter groups from the King’s list unite for an all-out assault on the Doomsday Machine, only to discover that Robotnik let them in.
Sonic sends his friends out on a captured pod and stays behind alone. He fails to wreck the control room, is nearly roboticized and escapes only by using several Power Rings at once. Uncle Chuck suggests the one power that could match Robotnik’s, the Deep Power Stones. With NICOLE’s help Sonic finds Robotnik’s stone, and he and Sally bring the two together.
Charged with their energy, Sonic and Sally streak through the machine and vaporise it. Robotnik flees in an escape pod, but the blast overtakes it. That night Knothole celebrates, and Sonic and Sally share a long-awaited kiss. In the ruins, though, an elevator rises and Snively, alone and in a new cape, declares that it is his turn to rule. He is not alone: a pair of eyes glows in the darkness behind him.
Sonic and the Freedom Fighters face Robotnik’s forces in their final assault on Robotnik’s forces. Sonic and Sally admit their love for each other. After nearly being Roboticized, Sonic recovers the Deep Power Stone that Robotnik had, and destroys the Doomsday Project with Sally, casting Robotnik into the Void as they do so. The ending leads to a cliffhanger that involves Snively and a mysterious red-eyed character (Ixis Naugus). This would prove to be the final episode of the series. It ended on a cliff-hanger as DiC (the animation company that made the show) expected ABC to let them do another season, however this did not prove to be the case.
— From Luke’s original SatAM episode guide on Sonic Scene
Key Moments
- The Doomsday Machine is destroyed by the combined Deep Power Stones.
- Sonic and Sally kiss.
- Snively takes over – and the mysterious eyes appear.

Trivia
- The series finale, aired on 3 December 1994.
- Ben Hurst confirmed to fans that the eyes in the final shot belong to Ixis Naugus.
- Title episode of NCircle’s 2010 DVD Doomsday Project.
Watch the Episode
The full episode, uploaded by WildBrain’s official Sonic The Hedgehog – WildBrain channel (checked 5 November 2026).
Part of our SatAM Season 2 guide. See the SatAM series page for the show’s history, cast and credits.
Sources: air date, writer and director from Sonic Retro (Wayback copies), Wikipedia and Sonic Wiki Zone, cross-checked; synopsis written for Sonic Scene from the episode and the official DiC description; title card and screenshots via Sonic Wiki Zone, copied to our media library.

