Submarine Alert (1943) is a Action, Thriller, War film that follows 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. Currently, you can watch Submarine Alert on fuboTV, MGM+ Amazon Channel, MGM Plus Roku Premium Channel, MGM Plus. Streaming availability may vary by country and platform over time. It has a user rating of 4.8 out of 10 from 11 votes. Fans of action movies may also want to explore similar titles below.