The Secret Voice (1936)

Genres - Action, Spy Film, Thriller  |   Run Time - 68 min.  |   Countries - UK  |  
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In this espionage thriller, a scientist develops a nonflammable fuel. Fearing that his life and the formula are in jeopardy, he photographs the formula and sends the picture to the League of Nations where it will be safe. Sure enough, the spies close in and kidnap his sister so he will be forced to give up the formula. Fortunately, the villains are thwarted and the formula is safe.

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Keywords

agent [representative], espionage, formula, fuel, kidnapping, rescue, scientist, secrets, sister, victim