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

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