Peter Lorre as Mr. Moto

Joseph Schildkraut as Hendrik Manderson

Lionel Atwill as Prof. Roger Chauncey Hildebrand

Virginia Field as Eleanor Kirke

John 'Dusty' King as Howard Stevens

Iva Stewart as Susan French

G.P. Huntley as Archie Featherstone

Victor Varconi as Paul Borodoff

John Bleifer as Wendling

Honorable Wu as Wong

Morgan Wallace as David Perez

Anthony Warde as Joe Rubla

Harry Strang as Museum Guard O'Hara

John Davidson as Prince Suleid

Eddie Abdo as Arabian Officer (uncredited)

Carol Adams as Minor Role (uncredited)

Jimmy Aubrey as Bum (uncredited)

Brooks Benedict as Gangster (uncredited)

Willie Best as Driver (uncredited)

Stanley Blystone as Ship's Captain (uncredited)

George Chandler as Cameraman (uncredited)

Jack Rube Clifford as Sergeant on Motorcycle (uncredited)

Chick Collins as Driver of Armored Car (uncredited)

James Conaty as Ship Passenger (uncredited)

Gino Corrado as Museum Exhibit Attendee (uncredited)

Lester Dorr as Reporter (uncredited)

Ralph Dunn as Police Guard (uncredited)

Jack Gargan as Museum Exhibit Attendee (uncredited)

William Gould as Police Captain (uncredited)

Bobby Hale as Steward (uncredited)

Sam Harris as Professor (uncredited)

Sam Hayes as Radio Announcer (uncredited)

Leyland Hodgson as Ship's Waiter (uncredited)

Sydney Jarvis as Museum Exhibit Attendee (uncredited)

Isabel La Mal as Matronly Woman (uncredited)

Hank Mann as Minor Role (uncredited)

Eric Mayne as Museum Exhibit Attendee (uncredited)

Bert Moorhouse as Reporter (uncredited)

David Newell as Museum Exhibit Attendee (uncredited)

Tom O'Grady as Husband (uncredited)

Pat O'Malley as Police Guard (uncredited)

Lee Phelps as Police Guard (uncredited)

Cyril Ring as Museum Exhibit Attendee (uncredited)

Jay Ward as Benny the Bellhop (uncredited)

Eric Wilton as Archaeology Professor (uncredited)

Robert Winkler as Boy on Ship (uncredited)

Beal Wong as Chinese Restaurant Patron (uncredited)

Iris Wong as Waitress (uncredited)

Jadin Wong as Dancer (uncredited)

Victor Wong as Restaurant Proprietor (uncredited)