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Availability last checked Sep 28, 2026.
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What it's about
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.
Cast and crew
- Director
- Frank McDonald
- Writer
- Maxwell Shane
- Starring
- Richard Arlen, Wendy Barrie, Nils Asther
Details
- Release date
- Jun 28, 1943
- Language
- Japanese, German, English
- Country
- United States
Where to Watch Submarine Alert (1943) in Canada — common questions
- Where to watch Submarine Alert in Canada?
- Submarine Alert is available with a subscription, free with ads, or to rent in Canada. Watch the movie with a subscription on FlixFling. Watch the movie free with ads on Tubi TV. Rent the movie on FlixFling.
- Can I stream Submarine Alert or do I have to rent it in Canada?
- Watch the movie with a subscription on FlixFling. Rent the movie on FlixFling.
- Can I watch Submarine Alert for free in Canada?
- Watch the movie free with ads on Tubi TV.
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