George Murphy

Inspector James 'Jim' Belden

Finlay Currie

Professor Albert Kafer

Virginia Gilmore

Millie / Teresa Zalenko

Karl Stepanek

Alexi Laschenkov / Gregory Anders

Louisa Horton

Mrs. Elaine Wilben

Peter Capell

Chris Zalenko / Gino

Bruno Wick

Luther Danzig

Vilma Kurer

Mrs. Rita Foss

Ann Thomas

Philadelphia Suspect

George Roy Hill

Nicholas Wilben