"Defying the hired assassins of the prairie's secret terrors!"
The McLean and Brennan ranches are both losing cattle to rustlers and each blames the other when cattle buyer Graves is the real culprit. To throw suspicion off himself Graves hires Tim to investigate, not knowing that this will be his downfall.
Tim McCoy
Tim Condon
Billie Seward
Janet McLean
Ward Bond
Bob Brennan
Guy Usher
Hadley Graves
Edward LeSaint
John McLean
Allan Sears
Pinto Carew
Jack Rockwell
Rawhide
Jack Rutherford
Lafe Brennan
George 'Gabby' Hayes
John Coffin, known as Pegleg Sanderson
The McLean and Brennan ranches are both losing cattle to rustlers and each blames the other when cattle buyer Graves is the real culprit. To throw suspicion off himself Graves hires Tim to investigate, not knowing that this will be his downfall.
When his cattlemen abandon him for the gold fields, rancher Wil Andersen is forced to take on a collection of young boys as his cowboys in order to get his herd to market in time to avoid financial disaster. The boys learn to do a man's job under Andersen's tutelage, however, neither he nor the boys know that a gang of cattle thieves is stalking them.
A cattle-vs.-sheepman feud loses Connie Dickason her fiance, but gains her his ranch, which she determines to run alone in opposition to Frank Ivey, "boss" of the valley, whom her father Ben wanted her to marry. She hires recovering alcoholic Dave Nash as foreman and a crew of Ivey's enemies. Ivey fights back with violence and destruction, but Dave is determined to counter him legally... a feeling not shared by his associates. Connie's boast that, as a woman, she doesn't need guns proves justified, but plenty of gunplay results.
Down-and-out cowhand Jim Garry is asked by his old friend Tate Riling to help mediate a cattle dispute. When Garry arrives, however, it soon becomes clear that Riling has not been entirely forthright. Garry uncovers Riling's plot to dupe local rancher John Lufton out of a fortune. When Lufton's firecracker of a daughter, Amy, gets involved, Garry must choose between his old loyalties and what he knows to be right.
When her husband dies en route to America, Martha Price and her daughter Hilary are left to carry out his dream: the introduction of Hereford cattle into the American West. They enlist Sam "Bulldog" Burnett in their efforts to transport their lone bull, a Hereford named Vindicator, to a breeder in Texas, but the trail is fraught with danger and even Burnett doubts the survival potential of this "rare breed" of cattle.
A wandering cowboy gets caught up in a range war.
In a modern cow town, the powerful ranch owner’s henchmen kill a ranch hand, prompting the sheriff to investigate despite facing strong opposition. He finds an unlikely ally in the rancher's overprotected daughter, but their quest for justice puts them both in danger.
Two brothers discharged from the Confederate Army join a businessman for a cattle drive from Texas to Montana where they run into raiding Jayhawkers, angry Sioux, rough terrain and bad weather.
At a Mexican ranch, fugitive O'Malley and pursuing Sheriff Stribling agree to help rancher Breckenridge drive his herd into Texas where Stribling could legally arrest O'Malley, but Breckenridge's wife complicates things.
Following the Civil War, headstrong rancher Thomas Dunson decides to lead a perilous cattle drive from Texas to Missouri. During the exhausting journey, his persistence becomes tyrannical in the eyes of Matthew Garth, his adopted son and protégé.
Young Travis Coates is left to take care of the family ranch with his mother and younger brother while his father goes off on a cattle drive in the 1860s. When a yellow mongrel comes for an uninvited stay with the family, Travis reluctantly adopts the dog.