Cast
Wyndham Standing
Man
John Halliday
John Morgan
Melville Cooper
Ship's Mate Penney
Dick Rich
Perrin's Henchman at Dock
Olaf Hytten
Agent
Pat O'Brien
Mike Farrough
Norbert Schiller
Submarine First Officer
Frank Baker
Detective
Don Beddoe
Ship's Chief Engineer Anderson
Alan Baxter
Larry Perrin, alias Larry Ross
Constance Bennett
Christine Blaine
Erwin Kalser
Dr. Adolph Behrens
Marjorie Gateson
Mrs. Winslow
Francis Pierlot
Professor Mudge
Stanley Logan
Captain James P. Hollister
Frank Sully
Tommy Malone
Jessie Busley
Mrs. Mudge
Bruce Bennett
Ship's gunnery officer
Edgar Buchanan
Charles Atterbee
Douglas Gordon
Ship's Lookout