An astronaut goes into space with a chimpanzee. When they return to Earth after their orbit, it is discovered that the chimp has the brains of the astronaut, and the astronaut has the brains of the chimp. Complications ensue.
Frankie Avalon
as Sergeant Deadhead / Sergeant Donovan
Deborah Walley
as Airman Lucy Turner
Cesar Romero
as Admiral Stoneham
Fred Clark
as General Fogg
Gale Gordon
as Captain Weiskopf
Harvey Lembeck
as Airman McEvoy
John Ashley
as Airman Filroy
Buster Keaton
as Airman Blinken
Reginald Gardiner
as Lt. Comm. Talbott
Pat Buttram
as The President
Eve Arden
as Lieutenant Kinsey
Romo Vincent
as Tuba Player
