The Gorilla (1930) is an American pre-Code mystery-comedy film produced by First National Pictures, distributed by Warner Bros., and directed by Bryan Foy.
It stars Joe Frisco, Harry Gribbon, Walter Pidgeon and Lila Lee, and is based on the 1925 play of the same name by Ralph Spence.
In the film, a man is warned by a threatening letter that a killer gorilla will arrive at his home before midnight.
When Cyrus Stevens receives a note that the gorilla will arrive at his home before midnight, he hires detectives Garrity and Mulligan to help protect him.
Marsden, who turns out to be an undercover detective, discovers that Stevens, in a gorilla suit of his own, is the real murderer.