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OPEN CLASSIC CINEMA · 373

Submarine Alert

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Synopsis

A radio engineer loses his job while federal investigators search for spies passing shipping information to enemy submarines. Desperate for work, he accepts an assignment involving a stolen transmitter. An apparent new acquaintance is also watching him, leaving the engineer caught between a criminal recruitment effort and an operation he does not understand.

Cast

Behind the scenes

Pine-Thomas filmed the thriller in June 1942, before its 1943 release through Paramount. Like other wartime espionage pictures, it links technical expertise with anxiety about infiltration at home. Existing aviation footage helped supply action beyond the production's studio scenes.

Sources and availability

The synopsis and editorial text were written for this collection. The references below were cross-checked to identify the film and its copy; each editorial section identifies its reference.

Work catalogued as public domain in the United States.

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Availability checked on September 10, 2026.

Photograph credit

Photographs cropped, resized and optimized as WebP, displayed in monochrome.