You'll Find Out (1940)

The manager of Kay Kyser’s band books them for a birthday party bash for an heiress at a spooky mansion, where sinister forces try to kill her.

Directed by: David Butler

Starring: Kay Kyser, Peter Lorre, Boris Karloff, Bela Lugosi, Helen Parrish, Dennis O'Keefe

Links: RKO Radio Pictures, IMDb, Movie posters, Movie stills

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