Operation Eclipse

Rondu's old friend Drennan unexpectedly shows up while the Orbots are escorting a convoy to Centris, where the Galactic Council of the United Planets government meets. Rondu welcomes Drennan and permits him to speak before the Council regarding his new invention, the Drennan Device (very similar in function to the Deflectron). Rob is uncomfortable with the free access Rondu is allowing Drennan, but Drennan is well-liked, even by Dia and the Orbots (Bort quips, "Lighten up, Rob. Not everyone's a space villain in disguise.") Unfortunately, Rob's fears are justified; Drennan has become a Shadow agent, and his treachery allows the Shadow fleet to destroy the UP convoy on the ground and surround Centris. Drennan uses his mental powers to put a "mental lock" on the Orbots which prevents them from joining together, and they are captured and imprisoned. However, Dia steals Drenna's fighter and her spectacular piloting skills allow her run the Shadow blockade and bring Rondu to safety. The Orbots subsequently also escape, but until Drennan's mental lock can be broken, Mighty Orbots is powerless to prevent Umbra from moving the Shadow Star to Centris and taking control of the entire galaxy. To break the lock, Rondu himself must confront Drennan in a psionic battle which will determine the fate of the galaxy...

Bo, Boo, Bort, Dia, Robert Simmons, Umbra, Tor, Crunch, Rondu, Oh No, Returns

One of the few U.S.-Japanese co-productions, this series lasted only a single season due to the huge success of "Transformers."

Along with "Galaxy High School," also by the same team, this was part of an effort by TMS to break into the American market with the help of producer Fred Silverman.