Herman Hoffman
Director
Cyril Hume
Screenplay
Edmund Cooper
Story
Nicholas Nayfack
Producer
Les Baxter
Original Music Composer
John Faure
Editor
Merrill Pye
Art Direction
Darrell Silvera
Set Decoration
Irving Block
Special Effects
Louis DeWitt
Special Effects
Jack Rabin
Special Effects
Harold E. Wellman
Director of Photography
Gus Schroeder
Production Manager
Richard Eyer
Timmie Merrinoe
Philip Abbott
Dr. Tom Merrinoe
Diane Brewster
Mary Merrinoe
Harold J. Stone
Gen. Swayne
Robert H. Harris
Prof. Frank Allerton
Dennis McCarthy
Col. Macklin
Alexander Lockwood
Arthur Kelvaney
John O'Malley
Prof. Baine
Gage Clarke
Dr. Bannerman
Than Wyenn
Prof. Zeller
Jefferson Dudley Searles
Prof. Foster
Alfred Linder
Martin / Computer
Ralph Votrian
1st Gate Sergeant
Michael Miller
2nd Gate Sergeant
Rayford Barnes
Capt. McLaren (uncredited)
Helen Kleeb
Miss Vandergrift
Alvy Moore
Scientist
Gary Vinson
Young soldier (uncredited)
Marvin Miller
Robby the Robot (voice) (uncredited)
