The Spy In White (1936)
The Spy in White , released as The Secret of Stamboul in the U.K., is a 1936 British thriller film , taken from the novel The Eunuch of Stamboul by Dennis Wheatley , directed by Andrew Marton and starring Valerie Hobson , James Mason and Frank Vosper . It was made at Shepperton Studios . The screenplay concerns a British agent who tries to thwart a revolution.