Kirk Douglas
Dr. Rolf Pedersen
Richard Harris
Knut Straud
Ulla Jacobsson
Anna Pedersen
Anton Diffring
Major Frick
Mervyn Johns
Col. Wilkinson
Barry Jones
Professor Logan
Geoffrey Keen
General Bolt
Robert Ayres
General Courts
David Davies
Captain of "Galtesund"
Victor Beaumont
German Sergeant
George Murcell
Sturmfuhrer
Russell Waters
Mr. Sandersen
Jan Conrad
Watchman in Factory
Annette Andre
Girl Student (uncredited)