William Gargan
— James Montgomery 'Jim' Wilson
Irene Hervey
— Frankie Gilroy Wilson
Charles Lang
— Tex Harper
Maria Montez
— Sonya Dietrich Landers
Lloyd Corrigan
— George Lewis
Mary Gordon
— Abigail 'Mag' MacPherson
Truman Bradley
— Dr. Gregory Landers
Phillip Trent
— Tom Hare
Turhan Bey
— Captain Chundra
John Bagni
— Paul, the Purser
George Lynn
— Bland (as Peter Lynn)
Billy Wayne
— Lamb
Wade Boteler
— Christopher Ruggles
Warren Ashe
— R. C. Bradford
J. Pat O'Malley
— Chief inspector
C. Montague Shaw
— Captain Caldwell
Philip Ahlm
— Submarine Gun Crewman (uncredited)
Edgar Barrier
— Man on Intercom (voice) (uncredited)
Harold Daniels
— Sam
Paul Dubov
— News photographer
Roland Got
— Bellhop (uncredited)
Eddie Hall
— Submarine Crewman firing on the Bombay Clipper (uncredited)
Riley Hill
— Steward (uncredited)
Keith Hitchcock
— Hotel clerk
Jack G. Lee
— News photographer
Connie Leon
— Chambermaid
Lal Chand Mehra
— Guard (uncredited)
John Picorri
— Waiter
Beatrice Roberts
— Miss Kane - Secretary (uncredited)
Mel Ruick
— Submarine commander