cast
-
Pat O'Brien
Mike Farrough
-
Constance Bennett
Christine Blaine
-
John Halliday
John Morgan
-
Alan Baxter
Larry Perrin, alias Larry Ross
-
Erwin Kalser
Dr. Adolph Behrens
-
Edgar Buchanan
Charles Atterbee
-
Frank Sully
Tommy Malone
-
Marjorie Gateson
Mrs. Winslow
-
Francis Pierlot
Professor Mudge
-
Jessie Busley
Mrs. Mudge
-
Melville Cooper
Ship's Mate Penney
-
Stanley Logan
Captain James P. Hollister
- Leslie Denison Ship's Mate Jones
-
Don Beddoe
Ship's Chief Engineer Anderson
-
Norbert Schiller
Submarine First Officer
- Frank Alten Submarine Radio Operator
-
Bruce Bennett
Ship's gunnery officer
- Rex Post First Mate
-
Dick Rich
Perrin's Henchman at Dock
-
Olaf Hytten
Agent
- Arthur Mulliner Detective
-
Frank Baker
Detective
- Frank Benson Sailor
- Bobby Hale Sailor
- Fred Wolff German Sailor
-
Douglas Gordon
Ship's Lookout
- Jean Prescott Mrs. Hollister
- Hans von Morhart German Sailor
- Paul Michael German Sailor
-
Wyndham Standing
Man
- Arno Frey Submarine Gunner
- David Dunbar Sailor
- James Kilgannon Sailor
- Hans Schumann Submarine Commander