Unqualified and delinquent alien ZIM is sent on a (thought to be) hopeless mission to capture a planet light years away along with an idiotic and humorous robot.
Gir messes with the security features of ZIM's house. Also, ZIM uses a time machine to 'attack' Dib throughout the past with the most vile of all weapons, rubber piggys.
ZIM, Dib, GIR and Gaz appear on Dib's favorite show, Mysterious Mysteries / ZIM tries to destroy the Earth by blowing up Prof. Membrane's power generator. Dib must save the Earth with the help from his future self, or so it would seem.
The Tallest tell ZIM that they will only grant his request for weaponry after he attains military training./ZIM accidentally creates a slowly expanding explosion.