On screen
Cast
25 credited performers
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
Artwork unavailable
Bruno Wick
Luther Danzig
Artwork unavailable
Vilma Kurer
Mrs. Rita Foss
Artwork unavailable
Ann Thomas
Philadelphia Suspect
George Roy Hill
Nicholas Wilben
Artwork unavailable
Karl Weber
FBI Agent Charlie Reynolds
Artwork unavailable
Michael Garrett
Michael Dorndoff aka Frank Torrance
Artwork unavailable
Lotte Palfi Andor
Anna Kafer
Artwork unavailable
Ernest Graves
Robert Martin
Artwork unavailable
Robert Carroll
Boldany
Wolfgang Zilzer
August Helmuth
Artwork unavailable
Bradford Hatton
Harry Mason
Rosemary Pettit
Mrs. Martin
Artwork unavailable
Eva Condon
Landlady
Steve Mitchell
Samson
Artwork unavailable
John Farrell
Taxi Driver (uncredited)
Nancy Hale
Mrs. Belden (uncredited)
Artwork unavailable
Westbrook Van Voorhis
Narrator (voice) (uncredited)
Mary Young
Old Lady (uncredited)
Artwork unavailable
Suzanne Moulton
Sherry Belden (uncredited)