Cowboy Mike Jordan kills two men in self defense and on returning to his herd finds his father and brother killed. He goes to the local sheriff to clear matters up but must settle accounts on his own.
Lone gunman Johnny West and his dog, Gypsy, fall foul of twin bad men who have designs on a gold mine. After having his gun hand crushed Johnny is joined by 2 feuding ex boxers and their explosive expert sidekick as they all take on the villains, restore the mine to it's rightful inheritor and face down the twins, one of whom attempts to outwit them using a clever coffin trick.
A famous bandleader, suffering from overwork and exhaustion, goes to a sanitarium for a rest. While there he dreams of being out west at a dude ranch, where he finds himself involved in the beautiful owner's struggle to keep her ranch from falling into the hands of the villain, who wants either her or her ranch (or, preferably, both).
Ramon and his bandit gang launch an attack on Danger City, searching for rumoured hidden treasure and unable to find the loot either kill or take as hostage all the men, leaving only the women and children to produce the treasure or face 'Deguello' - an attack with no quarter. Four men arrive in town searching for Ramon and agree to help protect the town from the bandits.
Two old drunks named Gin & Whiskey Joe, with their mules, engaged in a personal fight, find some gold nuggets in a river, they decide to look for the remaining ones through a map which they divide in half, gangs of bandits hear of the news and cast all suspicions on the holders of the map to two homosexual cowboys, who will seek refuge in a nunnery.
Cowboy is hired by an archaeologist to help find "Hidden Valley", where an Indian gold treasure is supposed to be buried. Just when he finds it, the archaeologist is killed, and the cowboy his charged with his murder.
Tex Mason and Peggy Turner each inherit one half of the Triple X Ranch. Thomas wants the ranch and he has Triple X hand Joe let his men rustle their cattle. Tex not only has to fight the rustlers, he must also contend with Easterner Peggy's idea of what a ranch should be.
While the original title, "Trailing the Killer" isn't a misnomer, it was a bit misleading since the "trailer" is a dog named Caesar (Caesar the Dog) and the killer is a mountain lion. But the makers also pointed out that Caesar "is the most intelligent dog actor since Rin-Tin-Tin" which probably lured a few Rin-Tin-Tin fans with a show-me attitude. Caesar prowls around the woods of the Northwest, dispatches a rattlesnake, visits his she-wolf mate and their pups, pauses to watch the dainty habits of a raccoon personally washing every morsel of food before eating it---and that raccoon had enough food to use up several minutes of running time---and then saves sheepherder Pierre (Francis McDonald)) from getting eaten by one mean mountain lion. Rin-Tin-Tin he ain't, but then who was?
A dying marshal deputizes a drifter to deliver the two killers in his custody to prison. However, the new deputy must elude a pair of bounty hunters who want to deliver the prisoners themselves to collect the reward and would think nothing of killing the deputy to get them.
A Kung-Fu fighter and his brother run away from a very important fight in China and are trailed to the United States by his opponent, where he finds him and a gang of outlaws in a small western town.
Lincoln Tate and Lorenzo Rineschi are the Kennedy/Connelly brothers who are out to avenge their father's death at the hands of the Crow and his men. In their search, they stumble upon a gold shipment that the bandits are after.
A frontier newspaper editor Kirby battles outlaw Tiger Morris who is causing indian uprisings to drive away settlers so that he will can claim a gold deposit as his own. With the help of General Custer, right wins out. Presented in serial form in 12 episodes.
Kincade and Blake cause a mail plane carrying a payroll to make a forced landing in the desert. When they try to get the money, prospectors Ted and Si drive them away. With the pilot shot, Ted takes over as pilot figuring another attempt will be made and this time the Sheriff will be there.
A mysterious master criminal known as The Voice plots with his gang to sabotage the Milesburg Oil Company, but the rightful heir has a secret army of her own to protect her rights.