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

Anthony Ostrer

Claude Kingston

Willem Mulder

Robert Raglan

Lt. Miller

Peter Prouse

Sgt. Bill Parrish