The Stooges are carpenters who become policemen. A mysterious burglar disguised as a gorilla has the cops baffled and Mr. Dill, the head of the citizens league, threatening the police chief's job. The boys go on the case and pose as night watchmen at an antiques store. They confront the crook, who turns out to be a real gorilla owned by Dill. After defeating Dill and some other bad guys in a wild fight, the gorilla drinks some nitroglycerin and blows up.
Practical Effects
Ray Corrigan's actual gorilla suit confusion
Stunts
Curly taking a shelf to the face, gracefully
Writing
Nitroglycerin punchline: literally explosive

Director
Jules White
Trivia, insights & behind the scenes
Ray Corrigan, the gorilla, owned his own suit and played 'Bongo' in dozens of films—this was his actual job.
The 19-minute runtime wasn't artistic choice—Columbia churned out 8 Stooge shorts yearly, assembly-line comedy.