Eric Kardin
Roddy McDowall
Marlina
Kristine Miller
Student
Glen Vernon
Soldier
Fred Kohler Jr.
First Lieutenant (uncredited)
Bob Peoples
First Organizer (uncredited)
Gil Perkins
First Student (uncredited)
Fred Krone
Franz
Harry Lauter
Captain Giorg Nicholoff
Rand Brooks
Professor Kardin
Byron Foulger
Nicholas
Murray Alper
Double Agent on Train
Marc Krah
Mrs. Krechow
Kate Drain Lawson
Old Man on Train Station
Michael Vallon
Scrubwoman
Effie Laird
Director
Wesley Barry
Producer
Set Dresser
Vin Taylor
Assistant Director
William Beaudine Jr.
Special Effects
Ray Mercer
Camera Operator
John J. Martin
Executive Producer
William F. Broidy
Sound Recordist
Tom Lambert
Continuity
Eleanor H. Donahoe
Story
Phyllis Parker
Writer
C.K. Kivari
Art Direction
Dave Milton
Director of Photography
William A. Sickner
Editor
Ace Herman
Original Music Composer
Edward J. Kay