Major William Allison
Robert Clarke
Princess Trirene
Darlene Tompkins
Gen. York
William Shephard
Secretary Lloyd Patterson
James 'Ike' Altgens
Gen. Lamont
John Loughney
Col. Curtis
Russ Marker
Mutant
Tom Ravick
Don Flournoy
Mutant Escaping from Jail (uncredited)
Arthur C. Pierce
Guard (uncredited)
Malcolm Thompson
The Supreme
Vladimir Sokoloff
Captain
Boyd 'Red' Morgan
Gen. Karl Kruse
Stephen Bekassy
Dr. Bourman
John van Dreelen
Capt. Markova
Arianne Ulmer
Col. Marty Martin
Ken Knox
Air Force Chief
Neil Fletcher
Dr. Richman
Jack Herman
Director
Edgar G. Ulmer
Casting Director
Sidney Lumet
Makeup Artist
Jack Pierce
Producer
Special Effects
Roger George
Director of Photography
Meredith M. Nicholson
Story
Executive Producer
Robert L. Madden
Screenplay
Original Music Composer
Darrell Calker
Editor
Jack Ruggiero
John Miller
Production Design
Ernst Fegté