The world is shocked by the appearance of three talking chimpanzees, who arrived mysteriously in a spacecraft. Intrigued by their intelligence, humans use them for research - until the apes attempt to escape.

Top Cast

Roddy McDowallCornelius

Kim HunterDr. Zira

Bradford DillmanDr. Lewis Dixon

Natalie TrundyDr. Stephanie 'Stevie' Branton

Eric BraedenDr. Otto Hasslein

William WindomThe President

Sal MineoDr. Milo

Albert SalmiE-1