Calificación
Reparto

Roddy McDowall
Eric Kardin

Kristine Miller
Marlina

Harry Lauter
Franz

Rand Brooks
Captain Giorg Nicholoff

Byron Foulger
Professor Kardin

Murray Alper
Nicholas

Marc Krah
Double Agent on Train

Kate Drain Lawson
Mrs. Krechow

Michael Vallon
Old Man on Train Station

Effie Laird
Scrubwoman

Glen Vernon
Student

Fred Kohler Jr.
Soldier

Bob Peoples
First Lieutenant (uncredited)

Gil Perkins
First Organizer (uncredited)

Fred Krone
First Student (uncredited)