Roddy McDowall
Eric Kardin
Acting
Kristine Miller
Marlina
Acting
Harry Lauter
Franz
Acting
Rand Brooks
Captain Giorg Nicholoff
Acting
Byron Foulger
Professor Kardin
Acting
Murray Alper
Nicholas
Acting
Marc Krah
Double Agent on Train
Acting
Kate Drain Lawson
Mrs. Krechow
Acting
Michael Vallon
Old Man on Train Station
Acting
Effie Laird
Scrubwoman
Acting
Glen Vernon
Student
Acting
Fred Kohler Jr.
Soldier
Acting
Bob Peoples
First Lieutenant (uncredited)
Acting
Gil Perkins
First Organizer (uncredited)
Acting
Fred Krone
First Student (uncredited)
Acting