The Black Sleep

The Black Sleep (American reissue title Dr. Cadman's Secret) is a 1956 American independent horror film produced by Bel Air Productions, directed by Reginald LeBorg, and written by John C. Higgins from a story by Gerald Drayson Adams. It stars Basil Rathbone, Lon Chaney Jr., John Carradine, Bela Lugosi, and Akim Tamiroff. Tor Johnson appears in a supporting role. The film was produced by Aubrey Schenck and Howard W. Koch, as part of a four-picture finance-for-distribution arrangement with United Artists. The film was released in the US in June 1956 as a double feature with the 1955 British film The Quatermass Xperiment (which was retitled The Creeping Unknown in the US). The Black Sleep was re-released in 1962 under the title Dr. Cadman's Secret on a double feature with Voodoo Island (which at that point was retitled Silent Death).