The Strange Door is a 1951 American horror film,[3] released by Universal Pictures, and starring Charles Laughton, Boris Karloff, Sally Forrest and Richard Stapley.

The picture was directed by Joseph Pevney and was based on the short story "The Sire de Maletroit's Door" by Robert Louis Stevenson.

Wounded by the guards, Voltan struggles to the dungeon and, with his dying breath, gets the key to Denis just as the walls start moving in again.

[6] The film is based on "The Sire De Malétroits Door" by Robert Louis Stevenson which was a short story initially published in Temple Bar magazine in 1878.

[7] Pevney later stated to Weaver that he did not know why he made The Strange Door, declaring that "I was a new director and I was assigned movies in those days and they told me, "This is what you're gonna do."

[12] The Strange Door had a sneak preview at Los Angeles's United Artists Theatre following a screening of the Joel McCrea Western film Cattle Drive.

[14] Among the comments made by the patrons, comments included on the violence on the film ("Excellent acting-interest plot without being too gruesome", "Maybe a little too much on the gory side") the actors ("Keep track of Richard Stapley", "Did not like Richard Stapley", "Sally Forrest stinks"), and the overall quality of the film ("Best picture I have seen in many months", "Kept you on the edge of your seat", and "This is the first picture attended in year since bought teleivision.

[15] In the first week of November, Universal started to release The Strange Door around the United States, specifically in California, the Northwest, the Midwest and the East Coast.

[16] The Strange Door, along with Night Key, Tower of London, The Climax and The Black Castle, was released on DVD in 2006 by Universal Studios as part of The Boris Karloff Collection.

In 2019, Kino Lorber's Blu-ray release featured a fact-filled audio commentary by Tom Weaver, Dr. Robert J.