Suspense (1946)

Frank Leonard, the proprietor of an ice-skating revue promotes Joe Morgan, a peanut vendor at the show, to a management position based on suggestions he made to improve the act of the show's star Roberta, who also happens to be the owner's wife. However, he soon begins to notice that Joe is paying more attention to his wife than he believes is appropriate, and begins to suspect that he has designs not only on his wife but on his business. Meanwhile, someone from Joe's past shows up with information that could wreck his plans.