An ex-gunfighter woos two women while avenging his brother, victim of a crooked gambler.

A demented archaeologist discovers a living, breathing serpent creature known to the Aztecs as Quetzalcoatl and accidentally kills his wife by giving her one of the beast's feathers, causing the creature to track her down and slaughter her. Using this knowledge he exacts revenge upon his enemies by placing one of the feathers on his intended victim and letting the beast loose to wreak havoc.

James Houghland, inventor of a new method by which television signals can be instantaneously sent anywhere in the world, refuses to sell the process to television companies, who then send agents to acquire the invention any way they can. On the night of his initial broadcast Houghland is mysteriously murdered in the middle of his demonstration and it falls to Police Chief Nelson to determine who the murderer is from the many suspects present.

John Wyatt is a government agent sent to smash a counterfeiting operation near the Mexican border. Joining Doc Carter's medicine show they arrive in the town where Curly Joe, who once framed Carter, resides.

An ambitious shoe salesman, Harold, unknowingly meets the boss' daughter and tells her he is a leather tycoon. The rest of the film he spends hiding his true circumstances, in the store and later on a ship. Trying to deliver a letter, he later finds himself dangling high above the street on a building's scaffolding.

A scientist is turned into an ape man.