- Country: USA
- Genres: Thriller, War
- Release: 1943-06-28
- Director: Frank McDonald
- Writers: Maxwell Shane
- Language: Japanese | German | English
- Stars: Richard Arlen , Wendy Barrie , Nils Asther , Roger Pryor , Abner Biberman , Marc Lawrence , John Miljan , John Miljan , Patsy Nash , Ralph Sanford , William Bakewell (1908–1993)
- Runtime: 66 min
- Awards: N/A
- AKA: Alerte aux sous-marins (France, French Republic) , Interceptor Command (United States of America) , Ubåt på vakt (Sweden) , Submarine Alert (United States of America) , Submarine Alert , Alerta submarina (Spain)
- Plot: Nazi spies use a stolen shortwave transmitter prototype to broadcast top secret shipping info to an offshore Japanese sub. To nab the spy ring, the Government has the West Coast's top radio engineers fired and shadowed to see if the Nazis recruit them to complete work on the prototype radio. Radio engineer Lew Deerhold, a resident alien without a job to pay for his adorable little ward Gina's life-saving operation, falls prey to the spy ring, and is swept up in a maelstrom of deceit and danger.
- IMDB:tt0036397
Submarine Alert Cast · · · ALL
Frank McDonald
Director
Richard Arlen
Lewis J. 'Lee' Deerhold
Wendy Barrie
Ann Patterson
Nils Asther
Dr. Arthur Huneker
Roger Pryor
G.B. Fleming
Abner Biberman
Commander Toyo
Marc Lawrence
Vincent Bela
John Miljan
Mr. Bambridge / Capt. Haigas
Patsy Nash
Tina Deerhold
Ralph Sanford
Agent Freddie Grayson
Jack Carr
Old Mill Gate Guard
Dwight Frye
Haldine (uncredited)