The Doomsday Project by Ben Hurst. Synopsis by Mark Briggs.

Mechanical infrastructure zooms about while Robotnik dreams control of Mobius in the Doomsday Project Tower. Snively informs Robotnik on the progress of the Doomsday Pods.

In Rotor's Workshop, Sonic receives a metal-eating hand balloon from Rotor. Sonic watches a pile of metal disintegrate from a balloon he had hurled at it.

Sonic decides to check on a sleeping Antoine in the lookout tower. Soon, the earth shakes as a Doomsday Machine appears right near them. It rampages destroying the perimeter of Knothole knocking a tree on Rotor's Workshop. Sonic saves Rotor and three balloons from the workshop.

Sally, Sonic, and the other FF's thought the attack commenced in another week to realize hundreds are being deployed right now. It forces them to take action.

Paulo Bear, Dirk Rhino, Ari Ram, and Lupe Wolf deploy decoy teddy-bear freedom fighters over the Doomsday Project. The distraction allows Sonic and the others to infiltrate Doomsday. Robotnik allows them access despite Snively's objections.

After making it to a tunnel, Sonic confronts two red head Robotnik orbs that keep up with him. He manages to outmaneuver them before getting shocked. Meanwhile, many other ff's get captured.

Perceiving a grim future, Sonic gets Nicole from Sally who leads the other out of the cave. Sonic finds the main energy hub room. He plants bombs for Nicole to remote detonate them. The diamond glass repels the explosion as Robotnik arrives activating a tube that pulls Sonic into a special robotisizer below.

Robotnik exclaims how Sonic has been a most worthy adversary insisting the game is over now. To his dismay, Robotnik witnesses Sonic escape the robotisizer with the aide of three power rings.

An exasperated Snively watches it all. Sonic fails the mission yet Chuck infers about the deep power stones. Sonic easily retrieves other stone piece from an unguarded Robotropolis.

Sonic and Sally return to Doomsday. Sonic warns Sally to stay behind but she insists on going no matter how it ends. When they enter the main hub, Sonic realizes the explosion might be enough to even wipe out Mobius. He proposes on flipping the stones for their incredible power. Swatbots surround them.

In a blazing glow of power ring energy amplified by 10,000, Sonic and Sally dash and ricochet throughout Doomsday to cause its implosion. Robotnik, Snively, Robots, and the captured FF's escape.

Sonic and Sally discontinue their attack immediately after Doomsday vanishes from being enveloped by energy. Sonic and Sally high five into a powerful energy shock and wonder what a kiss would do.

Back at Knothole the FF's shout freedom. Sally is glad they've finally won. On a stage with her, Sonic is sad it's over and that he'll lose his hero ship. They celebrate their victory under fireworks and a kiss.

Snively steps out of the evacuation tube saying that Robotnik finally let Sonic beat him. Snively vows to take over and that he's not alone. :Red Eyes:

Here ends the greatest show of my childhood. I hope many more forms of pleasure, excitement, and joy find its way into viewers and fans everywhere. This final episode is extremely tight. It's a mixed blessing that the show was never finished. I was M. Briggs of Fan . As long as you lend your imagination to the Sonic SatAM series it'll never die. It's way past cool. You can do it to it.

In an interview with Ben he more than rises to the occasion with ideas. He worked well to bring a movie-like series of animation. That the stories had to be unique with a beginning, middles, and end. The episodes had to have feeling with Freedom Fighter wins and losses.

In the future he restates that the show should focus on Tails. That is strayed too far from the games. It's my opinion (Mark Briggs) that's what made the series strong. A strong diverse class of real characters. Details and imagination to boot. Ben repeats the history of the third season and says thanks.

Note: I learned Ben had died only months before I published this synopsis. Farewell, Ben. :)

The DVD has Ben Hurst's commentary, Doomsday Story boards, deleted, and extended scenes.