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