- Peter Lorre
- Mr. Moto
- Joseph Schildkraut
- Hendrik Manderson
- Lionel Atwill
- Professor Hildebrand
- Virginia Field
- Eleanor Kirke
- John 'Dusty' King
- Howard Stevens
- Iva Stewart
- Susan French
- G.P. Huntley
- Archie Featherstone
- Victor Varconi
- Paul Borodoff
- John Bleifer
- Wendling
- Honorable Wu
- Wong
- Morgan Wallace
- David Perez
- Anthony Warde
- Joe Rubla
- Harry Strang
- O'Hara
- John Davidson
- Prince Suleid
- Eddie Abdo
- Arabian Officer
- Carol Adams
- Minor Role
- Jimmy Aubrey
- Bum
- Brooks Benedict
- Gangster
- Willie Best
- Driver
- Stanley Blystone
- Ship's Captain
- Suey Chan
- Guard
- George Chandler
- Cameraman
- Jack Rube Clifford
- Sergeant on Motorcycle
- Chick Collins
- Driver of Armored Car
- James Conaty
- Ship Passenger
- Gino Corrado
- Museum Exhibit Attendee
- Lester Dorr
- Reporter
- Ralph Dunn
- Police Guard
- Jack Gargan
- Museum Exhibit Attendee
- Dick Gordon
- Ship Passenger
- William Gould
- Police Captain
- Bobbie Hale
- Steward
- Sam Harris
- Professor
- Sam Hayes
- Radio Announcer
- Leyland Hodgson
- Ship's Waiter
- Sydney Jarvis
- Museum Exhibit Attendee
- Isabel La Mal
- Matronly Woman
- Hank Mann
- Minor Role
- Eric Mayne
- Museum Exhibit Attendee
- Moy Ming
- Restaurant Patron
- Bert Moorhouse
- Reporter
- Sol Murgi
- Ship Passenger
- David Newell
- Museum Exhibit Attendee
- Tom O'Grady
- Husband
- Pat O'Malley
- Police Guard
- Lee Phelps
- Police Guard
- Cyril Ring
- Museum Exhibit Attendee
- Paul Russell
- Ship Passenger
- Count Stefenelli
- Museum Exhibit Attendee
- Jay Ward
- Benny - the Bellhop
- Eric Wilton
- Archaeology Professor
- Robert Winkler
- Boy on Ship
- Beal Wong
- Chinese Restaurant Patron
- Iris Wong
- Waitress
- Jadin Wong
- Dancer
- Victor Wong
- Restaurant Proprietor
