Inner Sanctum is a movie about a murderer who is on the lam and hiding out in a small town. Unbeknownst to him, he is not only hiding in the same boarding house as the only witness to his crime, he is sharing the same room.

The story is framed with the murder victim speaking with a mysterious man who warns her not to leave the train at the next stop. Laughing that she ignores warning the mysterious man relates the story of the murder without revealing that she is the victim.

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Directed by Lew Landers, produced by Richard B. Morros (executive producer), Samuel Rheiner (producer) and Walter Shenson (producer), written by Jerome T. Gollard, starring Charles Russell as Harold Dunlap, Mary Beth Hughes as Jean Maxwell, Dale Belding as, Mike Bennett, Billy House as McFee, Fritz Leiber, Sr. as Doctor Valonius (the Seer), Nana Bryant as Thelma Mitchell, Lee Patrick as Ruth Bennett, Roscoe Ates as Willy, Eddie Parks as Barney and Eve Miller as Marie Kembar (Dunlap's Fiancée).

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Source: "Inner Sanctum (1948 film)" Wikipedia, The Free Encyclopedia. Wikimedia Foundation, Inc.. 8 November 2012. Web. 22 March 2013. ...).