Weasel once again is a hero of the city, while Baboon is only a window washer, on top of a sky scraper. However, he falls on Weasel's head, and they both crack they heads, and their brains pop out!
At the hospital, two brain surgeons try to figure out where to put which brain. Of course, the bigger one goes into the bigger body, Baboon's. This couldn't be farther from the truth, because as we all know, Weasel's brain is larger than Baboon's.
What follows is a series of unfortunate but hilarious moments with Weasel having Baboon's brain still being considered a hero and a genius, and Baboon having Weasel's brain, trying to make a living. At the end, Baboon/Weasel is elected the king of New York, and Weasel/Baboon is forced retired. A great episode, with absolutely no continuity towards the next episodes, but a fun episode never the less.