Gene Barry
Jonathan Clark
Gene Barry
Jonathan Clark
Valerie French
Eve Wingate
George Voskovec
Prof. Klaus Bechner
Azemat Janti
Ivan Godofsky
Stefan Schnabel
The Soviet General
Friedrich von Ledebur
Dr. Karl Neuhaus
Ralph Clanton
Mr Ingram
Arnold Moss
The Alien
Monty Ash
Soviet Prison Physician
Theo Marcuse
Soviet Col. Gregor
Paul Birch
Admiral
Paul Frees
Radio Newscaster Ward Mason
Marie Tsien
Su Tan
Charles Bennett
Gorki
John Bleifer
Spokesman
Irvin Ashkenazy
2nd Man
David Bond
Dr. Schmidt
Philip Van Zandt
Taxi Driver
Mel Welles
Russian Marshal
Peter Norman
Interrogator
Ross Bellah
Art Direction
John Mantley
Screenplay
William Asher
Director
Ferrol Redd
Sound Director
Ray Harryhausen
Special Effects
Henry Freulich
Director of Photography
John Mantley
Novel
Lewis J. Rachmil
Executive Producer
Frank Tuttle
Set Decoration
Jerome Thoms
Editor
Will Sheldon
Second Unit
Helen Ainsworth
Producer
Mischa Bakaleinikoff
Original Music Composer