The Secret of Stamboul, also known as The Spy in White, is a 1936 British thriller film, taken from the 1935 novel The Eunuch of Stamboul by Dennis Wheatley, directed by Andrew Marton and starring Valerie Hobson, James Mason and Frank Vosper.

The screenplay concerns a British agent who tries to thwart a revolution.

A British agent travels to Istanbul (Stamboul) to try to thwart a revolution.

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