21 May 1915
The Secret of the Submarine
An American adventure film serial comprised of fifteen episodes of two reels (24 min) each. All chapters are presumed lost.
The Secret Code
Feature version of the 1942 American serial film of the same title, prepared for the export market, never seen in any media format in the United States, and apparently a lost film.
Top Billed Cast
Paul Kelly 
Anne Nagel 
Trevor Bardette
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The Secret of the Submarine The Secret of the Submarine The Black Secret 
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