The Triceratons have traced Professor Honeycutt's teleport signal to Earth, and have initiated a full scale invasion to seize him.

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!!This episode provides examples of

* BigNo: April when Donny is captured.
* EasilyThwartedAlienInvasion: Notably averted in this six-part arc which portrays a large scale alien invasion.
* ShoutOut:
** As Mikey and Don play a video game, the former calls himself "[[Film/TheTerminator The Spacinator]]," complete with Creator/ArnoldSchwarzenegger impression, then says "[[Franchise/StarTrek Resistance is futile]]!"
** Mikey's line: "It's TheEndOfTheWorldAsWeKnowIt... [[{{Music/REM}} and I don't feel fine]]."
* TheUnmasquedWorld: The Triceratons' invasion of Earth reveals to the world the existence of aliens, which has a long lasting impact upon the rest of the series.
* WhamEpisode: The Triceratons invade Earth looking for the Fugitoid, who hasn't been on Earth for many months. The effects of the invasion are felt for the next two seasons.
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