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.
G
(All ages admitted. There is no content that would be objectionable to most parents. This is one of only two ratings dating back to 1968 that still exists today.)
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