Cast
Roddy McDowall
Roddy McDowall

Cornelius

 Kim Hunter
Kim Hunter

Zira

 Natalie Trundy
Natalie Trundy

Dr. Stephanie Branton

 Bradford Dillman
Bradford Dillman

Dr. Lewis Dixon

 Sal Mineo
Sal Mineo

Milo

 Eric Braeden
Eric Braeden

Dr. Otto Hasslein
Crew
Don Taylor
Don Taylor

Director

 Paul Dehn
Paul Dehn

Writer

 Arthur P. Jacobs
Arthur P. Jacobs

Producer

 Joseph F. Biroc
Joseph F. Biroc

Cinematographer

 Marion Rothman
Marion Rothman

Editor

 Jerry Goldsmith
Jerry Goldsmith

Music Director