Jeanpierre is an altered chimpanzee at the San Bruno Primate Shelter outside San Francisco. Jeanpierre was the chimpanzee in the cage next to Caesar in the same row. Like most of the apes at the sanctuary, he had been cruelly mistreated by Dodge Landon. He was shot at by John Landon with a tranquillizer gun and was shipped to Gen-Sys Laboratories for the revised ALZ-112 therapy - the ALZ-113 trials. Jeanpierre was one of the caged apes during the Gen-Sys Laboratories escape led by Caesar, Maurice and Rocket. During the Golden Gate Bridge battle, he was on the high-wire supports led by Koba, and lived to reach the redwoods at the Muir Woods Park.