The Unknown Guest is a 1943 American mystery film released by King Brothers Productions.

It was written by Philip Yordan, directed by Kurt Neumann and stars Victor Jory, Pamela Blake and Veda Ann Borg.

Philip Yordan had written a script for brothers Charles and Maurice King titled Dillinger, but the Kings suggested that Yordan write something less expensive to produce.

Yordan later recalled: Moskov’s advice was to avoid a gangster film.

I dreamed up an imitation Hitchcock idea, all taking place in a roadhouse closed for the winter.