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While carrying on their usual hi-jinks, they inadvertantly stow-away on a spaceship bound for Mars. They meet up with the local Martian residents and cause them to invade the Earth, aided by the "Invincitron", a vacuum-wielding giant robot. Tom, Jerry and their Martian ally, Peep, save the day.
Rob Paulsen
Computer / Worker #1 / Worker #2
Frank Welker
Spike
Jess Harnell
Major Buzz Blister / Martian General / Worker #3
Billy West
Major Biff Buzzard / King Thingg / Gardener #2