When a Broadway playboy is found dead, it's up to detective Jim Stevens to pick the murderer out of several likely candidates.

United States Marine Corps Captain "Happy" Smith and Gunnery Sergeant Wilmer lead a squadron of Marines in a search of a party of American tourists lost in a Central America banana republic jungle.

Joyce Harper is an ex-Army nurse who enters police work with the L.A. Police Department, when her friend Ruby gets involved with a petty crook, Max Taylor refuses to listen to Joyce's warnings, and eventually marries the hoodlum. Joyce gets through the detailed trained required to become an L.A. policewoman, and she and her newly-assigned detective partner, Harvey Gates cleanup up a skid-row Bar-girl scheme.And she and Gates are told to get the goods on a narcotics gang ran by Richard Cott , and Ruby and Max Taylor reappear.

A police reporter solves a murder case in Chicago, then moves on to St. Louis-but not voluntarily, since he has been kidnapped by the minions of the Windy City gang leader against whom he is scheduled to testify.

A brilliant detective is trying to break up a notorious crime ring, using part of an intercepted message. While investigating, he meets a beautiful and mysterious countess.