Scientists assembled to prove their methods are effective in criminal investigation try to solve a series of murders.

A kindly, enthusiastic, newly-arrived American immigrant from Hungary is forced to turn to a life of crime after his face is badly disfigured in a hotel fire.

Two harried businessmen, owners of a corset company, decide to go to a sanitarium for some rest and relaxation.

Two dimwitted detectives investigate the robbery of an express company.

The stooges, tricked by some con men into selling memberships to a phony duck hunting club, sell all the memberships to the police department. When the crooks skip town, the stooges are stranded at a duck-less lake with a lodge full of cops.

A millionaire falls for an army nurse, who tells him she likes men in uniform. So he enlists at Camp Cluster. She still has no time for him, so he figures out how to get into the hospital and under her care.

Set in the stone age, the stooges are cavemen who must have various misadventures hunting, gathering, and otherwise coping with prehistoric life. When some other cavemen threaten to take their women ("Aggie", "Maggie", and "Baggy"), the boys fight them off with a catapulting tree branch that shoots rocks and eggs.

The stooges are sailors working in a ships' tailor shop. When they can't get passes to go ashore, they steal officers uniforms and go to a party with Curly passing himself off as Admiral Taylor and Moe and Larry as his aides. Two spies, one of them a beautiful woman, trick the stooges into stealing a new submarine. The boys turn the table on the spies and capture them. When the real Admiral shows up, Curly's reenacts the capture and accidentally detonates a bomb, blowing them all to kingdom come.

The stooges are frontier guides leading a minstrel show west. When hostile Indians run the horses run off they are stranded. They must contend with a snow storm and a marauding bear as well the Indians. After almost killing each other ice fishing they solve their problems by rigging up a sail on the wagon and sailing west.

The stooges are actors traveling to perform at a fiesta in Mexico. After they accidentally switch suitcases with that of Dolores, a lovely senorita they met on trip down, they must sneak into her house to retrieve their suitcase. When they are confronted by her jealous husband he vows to kill them if he sees them again. At the fiesta where they are performing a comedy bullfight (Curly is the matador, Moe and Larry are in a bull costume) the husband bribes the attendants to let a real bull into the ring. Curly knocks the bull out with a head butt and becomes a hero.