A singing territorial ranger (Gene Autry) spots his younger brother in an outlaw gang.

This time the Durango Kid confronts an expert gambler.

A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an army of robots based on his prototype to conquer America. The only one standing in his way is Bob Wayne, who fights Satan as the enigmatic Copperhead. Mysterious Doctor Satan is a 1940 film serial named after its chief villain. Doctor Satan's main opponent is the masked mystery man, "The Copperhead", whose secret identity is Bob Wayne, a man searching for justice and revenge on Satan for the death of his step-father. The serial charts the conflict between the two as Bob Wayne pursues Doctor Satan, while the latter completes his plans for world domination.

A secret agent goes after the gang that stole the crown jewels of a European monarchy.

In this western, brave Red Ryder and his sidekick save a murdered judge's son from going to jail by proving that someone else killed his father.

Dr. John Meredith has been driven from civilization by the criminal activities of his twin brother Bradley Meredith. With his infant daughter, he settles in the African jungle, where his ability to cure the native ills has resulted in his virtual control of the Masamba tribes, who possess vast diamond mines coveted by a gang of crooks.

Oklahoma outlaw Belle Starr meets the Dalton gang when rescued from lynching by Bob Dalton, who falls for her. So do gang member Mac and wealthy saloon owner Tom Bradfield, who's enlisted in a bankers' scheme to trap the Daltons. Discord among the gang and Bradfield's ambivalence complicates things, as Belle demonstrates her prowess with shootin' irons and horses, and as a surprisingly racy saloon entertainer.

An American gunslinger kills a Mexican man in California immediately after the Mexican-American war. The killer is arrested and put on trial for murder with the Hispanic population waiting to learn of American justice.

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.

A mysterious criminal known as The Whispering Shadow commits crimes by means of a gang he controls by television and radio rays. Jack Norton, whose brother was murdered by The Whispering Shadow, suspects that the eerie Professor Strang - whose ghostly wax museum contains figures far too lifelike - may be involved in the crimes.

When a deadly Nitron ray strikes Earth, Flash Gordon and his friends travel to Mars to battle Ming the Merciless and his new ally Queen Azura.

Edited version of the 1939 Universal serial "Buck Rogers." A 20th Century pilot named Buck Rogers and his young friend Buddy Wade awake from 500 years in suspended animation to find that the world has been taken over by the outlaw army of Killer Kane.

Buck Rogers and Buddy Wade are in the middle of a trans-polar dirigible flight when they are caught in a blizzard and crash. Buddy then releases a special gas to keep them in suspended animation until a rescue party can arrive. However, an avalanche covers the craft and the two are in suspended animation for 500 years. When they are found, they awake to find out that the world has been taken over by the outlaw army of Killer Kane. Along with Lieutenant Wilma Deering, Buck and Buddy join in the fight to overthrow Kane and with the help of Prince Tallen of Saturn and his forces, they eventually do and Earth is free of Kane's grip.