Jeffrey Hunter

Captain Bill Ranson

Acting

Annemarie Düringer

Rolande Hertog

Acting

Nigel Patrick

Major Julien Howard

Acting

David Kossoff

Dr. Mulder

Acting

Rolf Lefebvre

Hans Faber, chief spy

Acting

Larry Burns

Martins, building porter-spy

Acting

Anthony Ostrer

Acting

Claude Kingston

Willem Mulder

Acting

Robert Raglan

Lt. Miller

Acting

Peter Prouse

Sgt. Bill Parrish

Acting

Philip Bond

Piet van Wijt

Acting

Otto Diamant

Mr. Hendrijk

Acting

Marianne Walla

Mrs. Hendrijk

Acting

Beth Rogan

Mary Ann Lennig

Acting

Arthur Gross

Jan Guldt

Acting

Wolf Frees

Brauner, shot spy

Acting