cast
-
Jeffrey Hunter
Captain Bill Ranson
-
Annemarie Düringer
Rolande Hertog
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Nigel Patrick
Major Julien Howard
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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
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Philip Bond
Piet van Wijt
- Otto Diamant Mr. Hendrijk
- Marianne Walla Mrs. Hendrijk
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Beth Rogan
Mary Ann Lennig
- Arthur Gross Jan Guldt
- Wolf Frees Brauner, shot spy