A petty thief schemes a big score when he plans an armored car robbery.

A Martian invader crashes his spaceship conveniently close to the workshop of a scientist who is developing an interplanetary craft. If the extraterrestrial Purple Monster can complete the rocket ship and return to Mars, he will be able to start a full-scale invasion of Earth. Good thing Craig Foster sets out to thwart the Monster's mission!

A crime ring is smuggling gold from Mexico across the border in the US. The Customs Service sends an agent to Mexico to try to infiltrate the ring and stop the smuggling.

The editor of a sleazy tabloid newspaper has been borrowing money from his lover, the wife of a rich theatrical producer, and promises to marry her when she gets a divorce. However, the husband refuses to grant her a divorce, and takes back all the money and jewelry he has given her. The editor sees her husband leaving her apartment and, seeing his opportunity, kills her, takes all his IOUs (and the jewelry) and frames the husband for the murder.

The Hollywood Post's sports writer, Jimmy Jones (Charles Quigley), yearns to be a crime reporter, and thus looks for foul play on even the most routine assignments. In writing a piece about a girl's softball team, Jimmy discovers that their sponsor, Foy Harris (John Gallaudet), is a notorious racketeer who has supposedly gone straight. Jimmy suspects Foy is still up to no good. He begins hanging around the team to do a bit of snooping, and also to be near the cute new pitcher, Ann Casey (Jacqueline Wells).

A notorious counterfeiter passes himself off as a Secret Service agent to Steve and gets him to unwittingly help him bilk the racetrack out of tens of thousands.

When a rival newspaper publisher complains to his captain about possible collusion between himself and reporter Torchy Blane on scooping her rivals in crime news reporting, Det. Lt. Steve McBride determines to thwart her efforts to get inside information - and she determines to go on getting it, by whatever means necessary.

A couple try to leave the Communist party after a murder by the group they were once loyal to.

A grifter in a boxing scam learns a better way from an orphan and a beautiful girl.

In this thriller, psychiatrist Dr. Cross kills his wife and expects to get away with murder, until he discovers that the slaying was observed by a next-door neighbor, Janet Stewart. As Janet attempts to convince her husband of the doctor's dastardly deed, Cross shows up to advise him that Janet is in dire need of some in-depth counseling.