A mystery grows after a bank robbery car leads investigators to a carnival sideshow.

A millionaire's brain is preserved after his death by a scientist and his two assistants, only to create a telepathic monster.

Jerry Blake (aka Federal Operator 99) teams-up with Joyce Kingston to thwart the plans of escaped crime boss Jim Belmont.

A mystery man, identifying himself as the outlaw Nevada Kid, and his comical sidekick, help the townspeople of Canyon City solve a series of murders, robberies, and threats to destroy their new power dam in the first days of electrification of the wild west.

Tom and Cora Elliott love their active social life so much that they neglect their daughter Mary and son Les. Fred Mason, Tom's neighbor and the doctor at the defense plant employing Tom, worries about the effect that Tom and Cora's drinking and socializing have on the children....

After bank robber Bob Hackett (Don "Red" Barry) learns that his real father was a marshal, he reforms and travels with his pal Buckshot (Wally Vernon) to Santa Fe, where his father was killed. When he stands up to rustlers working for Henry Jackson (Herbert Heyes), Hackett is made the new marshal.

Bill Harmon receives a letter from his partner, Dave MacRoy informing him of a rich gold strike in their California mine. Arriving there, Bill learns from elderly miner John Benton that Dave is dead and that he sold the mine at a strangely low price the night before his supposed accidental death. Harmon suspects murder.

A young girl goes to New York to find a band leader who has stolen all the songs she wrote and is passing them off as his own.

Two tuneful gamblers gambol across the country in a struggle for the money they need to run their respective casinos. It all begins when gangsters oust a gambler from the Big Apple. In need of quick cash, he goes to Las Vegas and enters a casino owned by a tough but pretty young woman. Cheating like crazy, the gambler breaks the house back and takes his considerable winnings back to New York to open his own casino. The woman is in hot pursuit and eagerly plans to turn the tables in her favor.

"Iron Mike" Haines (Tom Chatterton), a crooked sheriff, and "Hands" Weber (Roy Barcroft), the town blacksmith, are in cahoots and have been robbing stages, silver mines, etc., and framing innocent ranchers and cowhands with their deeds. They set out to rob the stage and frame Red Ryder (Bill Elliott as Wild Bill Elliott) for it, but the plan backfires and the sheriff is killed. The sheriff's son, Tommy (Jack McClendon), arrives home from college and is given his dad's job, not knowing he was a crook, and swears to get the man who killed him. Weber tells Tommy that Red killed his dad and Tommy sets out to get Red.

An Indian rug is the key to the location of a lost treasure. When the rug's owner is murdered, it becomes a case for Forest Ranger Steve King

Actress Carol Adams retires from the theater when she becomes engaged to businessman Gregory Davis, but is increasingly frustrated by Greg's unwavering devotion to his business. Tired of being ignored, Carol leaves her engagement ring with Greg's secretary, Sarah Anderson, and flies to Mexico City to repair her broken heart and visit her friends, Anita and Arturo Martinez. On the plane, Carol meets Ramon Carranza, a handsome singer and movie star who is wildly popular in Mexico.

After the Civil War, veteran Jim Christi (Allan Lane) returns to Texas, where he is unjustly accused of murder. In flashback, Mr. Christi relates the story of his father Corpus Christi Jim. After robbing a stage, Jim and partners Rocky and Steve decide to go straight and return the money. But the fourth member of the gang, Spade refuses and leaves. The two former partners soon find themselves on opposite sides of the law.

During the Civil War, three American soldiers are sent, disguised as civilians, to California to gather evidence that Southern agents there are agitating for that state to join the Confederacy with the aid of California's governor.