The outlaw gangs are robbing the railroads and the Rangers cannot follow them when they move to New Mexico. So Kip decides to take a vacation to New Mexico and, as the Durango Kid, bring Cass and his gang back to justice. But Cass and his gang are killed at the bank in a double cross and Kip must still find the loot. For this, he enlists the help of Tex and Grubstake, although Grubstake does not know it.

A cowboy and his Mexican-Irish sidekick lead a wagon train to an unfriendly place.

A marshal is sent to clean up a mining town being terrorized by an organized gang that is killing miners and stealing their claims.

Recently released from prison, nice guy Dave Collins finds himself unwillingly mixed up with his old outlaw acquaintances Turk Thorne and his gang as they try to use his telegraphy talents to zero in on the arrival of a gold shipment on the local train. Taking a liking to Collins, cowboys Tim Holt and Chito Rafferty get him to agree to help set a trap for the train robbers

Although ostensibly the grand-son of the legendary hero, Clayton Moore's Ken Mason is little more than a cowboy in a black mask in this 12 chapter Republic serial. Mason, the head of the telegraph line work crew, assumes his ancestor's trade-mark mask (but not whip) in order to prevent a local czar (Roy Barcroft) from sabotaging the burgeoning telegraph line. Pamela Blake, a brunette starlet formerly known as Adele Pearce, played Mason's imperiled girlfriend, and the serial also benefitted from the usual competent work of Republic's great stunt-performers, including Dale van Sickel, Tom Steele, Eddie Parker, and Joe Yrigoyen.

El Puma, a Mexican desert guide, escorts an archaeological expedition headed by Professor Lucius Lloyd through the Indian badlands of Mexico. Marian, the professor's niece accompanies the party as only she can translate the Aztec writings in the diary of her father, murdered on a similar expedition six years previous. The professor is murdered by a knife, and the weapon is recognized as the property of El Puma. Magpie, a Federal Investigator, knows that El Puma is really "Lightnin' Bill' Carson, a former federal agent who has been missing since Marian's father was slain. The reluctant Magpie believes that his old pal is guilty. Carson sets out to prove otherwise.

The Three Stooges travel West where they become heroes by nabbing a gang of would-be robbers.

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.

Hunters trespass into Sukulu country, where animals are sacred, posing as photographers.