Behind Locked Doors is a 1948 film noir directed by Budd Boetticher and starring Lucille Bremer, Richard Carlson and Tor Johnson.

The latter include an arsonist and "The Champ," a lunatic ex-boxer who attacks anyone put into a room with him after he hears what sounds like a bell.

Keith Phipps, writing for the Onion AV Club, wrote of the film, "A probable inspiration for Sam Fuller's Shock Corridor, Doors suffers in comparison; Fuller made transcendent B-movies, and this isn't one.

"[2] Film critic Dennis Schwartz gave the film a mixed review, writing, "Budd Boetticher directs a fast-paced low-budget B-film thriller with a far-fetched idea as its storyline and presents a shaky portrayal of the mental health profession.

Boetticher is better known today for the many splendid Westerns he directed during the 1950s with Randolph Scott as star, which include Comanche Station, Ride Lonesome, and The Tall T."[3]