"Someone has absconded with $4,000,000 worth of diamonds, and that someone may very well be a passenger on the Bombay Clipper."
William Gargan
as James Montgomery 'Jim' Wilson
Irene Hervey
as Frankie Gilroy Wilson
Charles Lang
as Tex Harper
Maria Montez
as Sonya Dietrich Landers
Lloyd Corrigan
as George Lewis
Mary Gordon
as Abigail 'Mag' MacPherson
Truman Bradley
as Dr. Gregory Landers
Phillip Trent
as Tom Hare
Turhan Bey
as Captain Chundra
John Bagni
as Paul, the Purser
George Lynn
as Bland (as Peter Lynn)
Billy Wayne
as Lamb
Wade Boteler
as Christopher Ruggles
Warren Ashe
as R. C. Bradford
J. Pat O'Malley
as Chief inspector
C. Montague Shaw
as Captain Caldwell
Philip Ahlm
as Submarine Gun Crewman (uncredited)
Edgar Barrier
as Man on Intercom (voice) (uncredited)
Harold Daniels
as Sam
Paul Dubov
as News photographer
Roland Got
as Bellhop (uncredited)
Eddie Hall
as Submarine Crewman firing on the Bombay Clipper (uncredited)
Riley Hill
as Steward (uncredited)
Keith Hitchcock
as Hotel clerk
Jack G. Lee
Connie Leon
as Chambermaid
Lal Chand Mehra
as Guard (uncredited)
John Picorri
as Waiter
Beatrice Roberts
as Miss Kane - Secretary (uncredited)
Mel Ruick
as Submarine commander
Tom Schamp
Suran Singh
as Singapore Policeman (uncredited)
Harry Strang
as Submarine officer
John Rawlins
Director
Roy Chanslor
Screenplay
Stanley Rubin
Melville Shyer
Assistant Director
Marshall Grant
Associate Producer
Stanley Cortez
Director of Photography
Jack Otterson
Art Direction
Harold H. MacArthur
Assistant Art Director
Otto Ludwig
Editor
Russell A. Gausman
Set Decoration
Vera West
Costume Design
Hans J. Salter
Music Director
Technical Advisor
Bernard B. Brown
Sound Supervisor
Eugene Joseff
Charles Carroll
Sound