The Keyhole is a 1933 American pre-Code comedy-drama film directed by Michael Curtiz, starring Kay Francis and George Brent, and featuring Glenda Farrell, Monroe Owsley and Allen Jenkins.

Acting on advice from Brooks' sister (Helen Ware), Anne books a cruise ship passage to Havana, Cuba, to lure Le Brun out of the United States so that he can be blocked from re-entering.

Suspicious of her behavior, Brooks hires private detective Neil Davis (George Brent) to follow her and report on whether she is having an affair, but tells him that she is merely a young woman that he's interested in.

Davis makes contact with her and sends reports to Brooks that she is not having an affair, but begins to develop a romance with her himself.

Back in New York, Brooks learns about the blackmailing from his sister and leaves on a plane to Cuba to apologize to Anne for being suspicious.