The Pinky and The Brain who live in the future travel back in time to give their present-dwelling counterparts a book on how to take over the world. The present pair travel to the future and find themselves in a world where cockroaches and are ruling the planet. After being captured, they escape to their capsule, which takes them safely back to the lab. But when Pinky leaves the book in the capsule, the craft vanishes, leaving the jet-lagged mice pondering how to take over the world yet again. Written by
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[in a time machine going two billion years into the future
Let me put this in terms even you can understand; remember that sandwich that was behind the refridgerator for two weeks?
Oh, you mean the one that tasted like sauerkraut?
...I'll take your word for it. Anyway, in two billion YEARS, that sandwich would evolve into a life form capable of setting up churro stands on the planets of distant galaxies!