Lon Chaney, Jr. plays two roles in this dazzling detective thriller. He and his partner must track down a big-time jewel thief and his disfigured right-hand man (also Chaney) when the crooks kidnap a friend of the sleuth's and steal her valuable ruby. Manuel Lopez and Sheila Terry co-star. AKA: "Murder in Morocco," "A Scream in the Dark," "The Secret of Buddha." 58 min. Standard; Soundtrack: English. Plays All Regions.