Espionage Agent

Barry Corvall

Brenda Ballard

Lowell Warrington

Mrs. Corvall

Karl 'Muller' Mullen

Paul Strawn (as Robert O. Davis)

Dr. Anton Rader

Dudley Garrett

Hamilton Peyton

Walter Forbes

Dr. Helm

Swiss Gendarme (uncredited)

Decker

Bruce Corvall

Secretary of State

Phineas T. O'Grady

Mrs. O'Grady

Larsch

Instructor

Geneva Restaurant Patron

Minor Role

Youth

Geneva Restaurant Patron

American Tourist