A would be homesteading family is so afraid after seeing two men lynched by a rancher's gang, they refuse to cooperate with Marshall Crown, until one of them blackmails the rancher.
Crown tries to help Major Covington capture his son, an expert with dynamite, who has deserted the army and joined a band of murderous marauders.
An ex-convict kidnaps Francis and forces Marshal Crown to assist him rescue a number of prisoners being shipped to federal prison on a special train.
Marshal Crown, during the course of an hauntingly foggy night, hunts for a killer who is butchering his victims. Francis tells crown about how police in London were unable to solve a similar set of killings earlier that year -- by someone who called himself Jack the Ripper.
Marshal Crown "sentences" a trail boss to the position of Deputy Marshal in a nearby town to run concurrently with the hard-labor sentences his men are serving for various crimes. A vindictive judge releases the hardcases hoping they will cause trouble for their former boss.
Marshall Crown hires a one-handed gunslinger as a deputy, not realizing the man has assumed the identity of a slain lawman and is intent on avenging himself on members of his former gang who abandoned him after he was wounded in a payroll hold-up.
Marshal Crown tries to prevent the Houston clan from entering the Mocane Valley before it's open for settlement. The Houston's believe they'll have little competition for prime land because of the legend of a malevolent beast thought to lurk in the valley. When the wagon train is destroyed and most of its travelers killed, Marshal Crown and his men search for the culprits not knowing if their quarry is man or beast.
With Marshal Crown out of town, acting Deputy Marshal MacGregor pursues escaped hired gunman Luther Happ. After tracking down the escaped fugitive and killing him in a shootout, the wounded MacGregor passes out and awakens in a Texas jail, where he is accused by Sheriff Jack Hawkes of murdering Deputy Luther Happ.
When killer Dickie Vardeman is arrested for murder, Marshal Crown suspects the outlaw Vardeman clan will try to rescue him, and sends the killer by train to a neighboring town for trial.
Cavalry veteran Sergeant Bill Disher is driven to drunken rage when his close friend Little Tom is killed in an accident. Disher bitterly blames the modernization and expansion of the West, and burns down Cimarron's funeral parlor.
When Wilcat Gallagher's Wild West Show hits Cimarron, trouble starts when the shows main attraction features the reenactment of a cavalry slaughter of Indians called, The Battle Of Bloody Stones. When Indians in the Cimarron territory become angry with the way that the battle is portrayed, conflict erupts between the Indians and Wildcat Gallagher's band.
With a little help from his old gang, widely known outlaw Jud Starr slips the hangman's noose and begins a law breaking rampage over the entire Cimarron Strip. Upon discovering that Starr and his gang are using the Cherokee Outlet as a place of refuge, Marshal Crown sets out to track them down.
While in the Cimarron jail, wild and hot tempered cowpoke ""Screamer"" witnesses outlaw Ace Coffin commit the cold-blooded murder of a fellow bank robber. Knowing that there is a $10,000 price on Coffin's head, Screamer offers to help Crown track down the killer and his band of outlaws.
Cimarron Strip is an American Western television series that aired on CBS from September 1967 to March 1968. Starring Stuart Whitman as Marshal Jim Crown, the series was produced by the creators of Gunsmoke. Reruns of the original show were aired in the summer of 1971. Cimarron Strip was one of only three 90-minute weekly Western series that aired during the 1960s, and the only 90-minute series of any kind to be centered primarily around one lead character. Cimarron Strip was set in the Oklahoma Panhandle, which comprises, east to west, Beaver, Texas, and Cimarron counties in Oklahoma. The show is set in 1888, just as the continuous frontier of the West, which once ran from the Canadian to the Mexican border, was closing. In less than five years there would no longer be that "continuous frontier," only pockets of undeveloped land. This was the late "Wild West" that Marshall Jim Crown was called to defend.