Calificación
Reparto

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

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