Hugh O'Brian

Character: Hugh Lombard

Shirley Eaton

Character: Ann Clyde

Fabian

Character: Mike Raven

Leo Genn

Character: General Mandrake

Stanley Holloway

Character: Det. William Henry Blore

Wilfrid Hyde-White

Character: Judge Arthur Cannon

Daliah Lavi

Character: Ilona Bergen

Dennis Price

Character: Dr. Edward Armstrong

Marianne Hoppe

Character: Elsa Grohmann

Mario Adorf

Character: Joseph Grohmann

Bill Mitchell

Character: Narrator (voice)

Christopher Lee

Character: Mr. U.N. Owen (voice)