On screen
Cast
16 credited performers
Jeffrey Hunter
Captain Bill Ranson
Annemarie Düringer
Rolande Hertog
Nigel Patrick
Major Julien Howard
David Kossoff
Dr. Mulder
Artwork unavailable
Rolf Lefebvre
Hans Faber, chief spy
Artwork unavailable
Larry Burns
Martins, building porter-spy
Artwork unavailable
Anthony Ostrer
Character not listed
Artwork unavailable
Claude Kingston
Willem Mulder
Robert Raglan
Lt. Miller
Artwork unavailable
Peter Prouse
Sgt. Bill Parrish
Philip Bond
Piet van Wijt
Artwork unavailable
Otto Diamant
Mr. Hendrijk
Artwork unavailable
Marianne Walla
Mrs. Hendrijk
Beth Rogan
Mary Ann Lennig
Artwork unavailable
Arthur Gross
Jan Guldt
Artwork unavailable
Wolf Frees
Brauner, shot spy