출연진
Jeffrey Hunter
Captain Bill Ranson
Annemarie Düringer
Rolande Hertog
Nigel Patrick
Major Julien Howard
David Kossoff
Dr. Mulder
Rolf Lefebvre
Hans Faber, chief spy
Larry Burns
Martins, building porter-spy
Anthony Ostrer
Claude Kingston
Willem Mulder
Robert Raglan
Lt. Miller
Peter Prouse
Sgt. Bill Parrish
Philip Bond
Piet van Wijt
Otto Diamant
Mr. Hendrijk
Marianne Walla
Mrs. Hendrijk
Beth Rogan
Mary Ann Lennig
Arthur Gross
Jan Guldt
Wolf Frees
Brauner, shot spy