A beautiful woman tries to avoid her marshal husband for his own protection, because a gang of robbers is planning on killing him over a robbery he foiled, thanks to her warning.

Luke Wiley is a notorious, coward, bounty hunter dubbed "The Jackal" because he brings in his prisoners dead, and now he wants to take in a friend of Jess who is wanted for murder.

Slim Sherman is riding shotgun on $10,000 of stage line money he needs to deliver to the office in Rockland City. One hold up is foiled but a second attempt by the stage driver, Frank Skinner, in Rockland City results in the death of Jack Adams, well liked manager of the stage office, and the loss of the money. The posse is unable to track Skinner and the sheriff is suspicious of Slim, when he starts cozying up to Skinner's girl, Annie. Slim is using Annie to find Skinner and it doesn't set well with him, especially when Annie starts having feelings for him he can't ...

Outlaws rob the Laramie bank but one of them is shot and killed by the sheriff during the chase. The outlaw is riding a palomino horse with the Sherman Ranch brand so the sheriff returns the horse to Slim Sherman, hoping that Slim can identify the outlaw. Since the palomino, Cyclone, was stolen the year before Slim can't help. The arrival of Cyclone causes problems between Slim and his brother Andy when the high strung animal starts breaking fences and harassing the other Sherman horses. When Slim threatens to get rid of Cyclone, Andy takes Cyclone and runs away, only...

Jess Harper comes to Danver's Pass looking for Dan Preston and immediately runs afoul of Matt Jessup and his gang. Jessup owns the town and Jess is asking too many questions about Dan Preston. Preston is a prospector who helped Jess out of jam once and he's contacted Jess needing his help. Everybody in town denies ever hearing of Preston but circumstances convince Jess that whoever isn't in Jessup's pocket, like the sheriff, is too scared to talk. What little help he gets is from Mae at the hotel and Chuck, the deputy sheriff. When Jess' stubborn search nearly gets ...

Money is a little tight at Sherman Ranch and Relay Station which forces Slim Sherman and Jess Harper to become mustangers to make ends meet. While catching mustangs they save Luke Gregg's life and Slim ends up offering Luke a spot at the ranch. There's something about Gregg that doesn't set well with Jess, especially when Gregg brings up something in Slim's past, about his involvement with Ed McKeever and what happened at Adobe Wells. Slim and Andy's trust in Gregg is matched by Jess' mistrust and causes dissension between them. When Mort Cory is shot and wounded Jess...

The stage line is expanding and needs horses but they are competing with the Army for stock. Slim Sherman and Jess Harper, hoping to capitalize on the premium the stage company is offering, decide to buy stock from Sam Bronson in Colorado to sell to the stage line. Jess, having cheated on the coin toss with Slim, gets more than he bargained for on the trip. Sam Bronson's runaway daughter, horse thieves and a two-timing murdering Romeo are what's in store for him as he tries to get the horses back to Laramie by the July 1st deadline to collect the bonus.

Vern Clark arrives at Sherman Ranch and Relay station with his new wife finds that he's now the new marshal in Laramie since the Torrey brothers have just killed Marshal Blanton. Clark and Jess Harper mix about as well as oil and water and Jess refuses to be deputized by Clark until a neighbor is killed by the Torrey brothers. Jess rides into town to join the posse being formed by Clark. The posse finds themselves out-gunned by the Torrey gang and Clark breaks and runs after being grazed by a bullet. Believing himself a coward, Clark refuses to perform his duties, ...

Sam Jarrad is a bounty hunter turned sheriff of Willow, Colorado and Jess Harper has become a man with a price on his head for killing Blake Wilkie. Jarrad comes to Laramie with a warrant for Jess, an affidavit from a dead man and his eye on the bounty. Jess has no choice to but to go with Jarrad but Slim is hot on their trail after being deputized by the Laramie sheriff to see that Jess makes it to Willow alive. The Wilkies own Willow and Jess doesn't believe he'll get a fair trial, despite Slim's assurances, and effects an escape. Exhausted, Jess is easily ...

Slim Sherman arrives in Laramie to buy supplies and finds the town pretty much empty, due to rumors of a gold strike in Cherry Creek. Slim's arrival coincides with Tom Bedloe and his gang who started the rumor of the gold strike. Unable to get help and outnumbered, Slim has to play criminal in order stay alive and free. It's a desperate gamble since Tom Bedloe has another agenda, he's looking for the daughter he's never seen. Complicating Slim's plan is Duke, Bedloe's right hand man, who distrusts Slim and his story. When his cover is blown it will cost Slim his life ...

Fran Ericson, a woman from Slim Sherman's past, arrives in Laramie with one agenda, to ruin the stage company that ruined her father. It begins with a group of thugs roughing up Slim, Jess Harper and their friend Smudge at the relay station and follows with Kem Backer, a man who has an offer that Slim shouldn't refuse. Break his contract with Overland and become a relay station on a new stage line. Other station owners have signed but Slim stubbornly refuses to break his contract with Overland and finds out that Fran Ericson is one of the investors behind the new line...

When Ben Parkison's youngest son is accidentally shot and killed on Sherman land it revives a years old feud between the Parkison's and the Sherman's. Ben challenges Slim Sherman to a duel that the young rancher doesn't want to fight, despite pressure from Parkison and the citizens of Laramie. It isn't until Ben Parkison kidnaps Jess Harper and threatens to kill him that Slim risks his life to save Jess from hanging.

It's Christmas at Sherman Ranch and Relay Station and the Sioux are on the warpath. A strange group of refugees have taken shelter at the station with Slim Sherman and Jess Harper; a bitter army widow, a lonely orphan boy, a gun-runner, a business man and his wife, a bandit and a gold filled strongbox. The atmosphere is far from festive with Sioux braves surrounding the ranch trying to kill the occupants. The only thing that seems to draw this disparate group together is one small orphan boy. Despite the desperate odds against their survival, they manage to cobble ...

Kuba Smith is a wily old outlaw on the run from a posse and with substantial price on his head. When he kills the sheriff chasing him he concocts a devious plan to switch identities with the dead man and lure a hapless stranger into thinking he killed Kuba Smith for the reward. Unfortunately the strangers he picks are Slim Sherman and Jess Harper who collect the reward, only to have it stolen from them by Kuba Smith himself. With the only clues the name on a watch and a location from ten years previous, Slim heads off to Prairie Lee to find Kuba's wife, only he finds ...

Clay Jackson, a charming self-styled Robin Hood, has come to Laramie to ply his trade; to rob from the rich and befriend the poor so that witnesses to his thieving ways are few. His presence creates friction between Slim Sherman and Jess Harper, with Jess beholden to Jackson for saving his life. When Jackson goes free after his trial for holding up the Laramie stage, events are set into motion to drive Jackson to steal again, only it costs the deputy sheriff his life. Slim is set to avenge the deputy, despite the fact that Jackson is the faster gun, which puts Jess ...

Joe Cloud, a Native American, is murdered by Carl Vail while working for Slim Sherman. When Slim prefers charges of murder against Carl it pits the rancher against the town and the Vail family. To get justice for Joe, Slim wires Gen. Taylor Roberts for help. In the meantime Sherman ranch is being harassed and when Luke Vail, outlaw, comes home he tries to intimidate Slim into backing off. Slim fails to be intimidates and Carl Vail is found guilty of murder and sentenced to hang. It's the town of Laramie against Slim, Jess and Gen. Roberts, who want nothing more than ...

Clint Wade comes to Sherman Ranch and Relay station to force Jess Harper to lead him to where Jess caught up to his brother Roy five years previous. Clint wants the $80,000 in gold that his brother hid and Jess is the only one that can lead Clint to the gold. Faced with a life or death decision, Jess has no choice but to agree and it's an arduous trek through the desert over a route Jess barely remembers. They are soon overtaken by Clint's cell mate Deke Belden and suddenly it's Belden calling the shots. When they arrive at the old mission where Jess caught up with ...

Slim Sherman and Jess Harper are in Jackson City to buy cattle from George Lake when he reneges on the deal, leaving Slim steaming mad and ready for a fight. When Lake is later killed, circumstantial evidence points to Slim as the murderer. Jess is Slim's only hope to clear him of the murder. The puzzle gets only more convoluted with a odd assortment of characters all looking for a Durango cavalry spur that is purported to contain a map to the fabled Lost Dutchman Mine. Lake was murdered for it and the only man that can clear Slim wants it. With everyone ...

Troy McCanles has set her cap for Jess Harper and has shown up at the ranch to pickup where they left off in Texas, much to Slim Sherman's amusement. Jess wants nothing to do with Troy, seeing as her and her outlaw family nearly got him lynched in Laredo. Troy hasn't quite shaken loose of her outlaw family either, as she promised Jess. They've followed her to Laramie and are determined to make trouble for her. When Slim falls for Troy he has no idea about her outlaw past until she admits all to him. But blood is thicker than water as Slim finds out.

Ben Yuma is badly wounded in a train robbery and badly needs a doctor. He and his gang have holed up in the caves near Laramie where he sends his brother for the doctor. Slim Sherman has gone to Laramie to fetch the Doc Kingsley, the vet, for his prize mare. He also picks up Sandy, one of saloon girls that has been asked to leave town. On the way to the ranch, in a case of mistaken identity, Phil Yuma kidnaps all three thinking that Doc Kingsley is a medical doctor. Kingsley is forced to remove the bullet from Ben Yuma but all is not well within the gang's ranks. ...

Marshal Jim Craig is escorting Gil Spanner to Cheyenne to testify against Chad Farrell, but Gil is anything but cooperative and Craig is now nursing broken ribs. With Farrell's men on their trail to stop Spanner from testifying, the sheriff of Laramie out of town, Craig takes Spanner to Sherman Ranch for help, putting Slim Sherman and Jess Harper in the thick of things. They find an unlikely ally in Val Farrell, Chad's wife, who wants nothing more than to see her husband hang. They are trapped in the ranch house with Farrell's men on every side and their own numbers ...

Slim Sherman stumbles upon murder victim Hap Matthews and ends up getting shot by the murderer and left to die. Jess Harper saves his partner and ends up trailing the suspect to the town of Rimrock. A town with many secrets and lies being covered up by Sheriff Grant McLintock and his deputy. When Jess pushes too hard for answers to the murder of Hap Matthews and the wounding of Slim Sherman, he's framed for attempting to murder Holly Matthews, Hap's daughter. Caught by the ruthless sheriff and his vicious deputy Jess has to escape and prove he's innocent and that the ...

Cory Lake is the half breed heir to a large ranch that he wishes to give to his mother's Cheyenne people, much to the disgust of his uncle and cousins. His uncle has Cory committed to an asylum so that he can sell the ranch out from under Cory. When Slim Sherman finds out he goes to see Cory but Doc Tolan claims that Cory is criminally insane. With Slim trying get Cory legally released, he escapes and makes matters worse by attacking Slim. Slim is left no choice but to join the posse chasing Cory and convince him to give up. It's desperate race to keep Jud from ...

Slim Sherman is hired to take Professor Landfield into the badlands to hunt for gold. Slim doesn't know that the professor is really Morgan Bennett, member of the Plummer gang who's escaped from prison, and that he is after the gang's loot buried in the badlands. What Slim doesn't know just may end up costing him his life and it's up to Jess Harper, with the help of ne'er do wells Pete and Len Dixson, to save Slim and bring Morgan Bennett to justice.

Harry Markle is trailed into Laramie by a bounty hunter and turned over to acting deputy sheriff Jess Harper for the night. Jess owes Markle his life when Markle cut him from a hangman's noose years earlier. Markle is now accused of robbing the American Mail Company and killing the night watchman and he claims he's as innocent as Jess was on that long ago day. Jess repays the debt at the expense of his reputation, by letting Markle go then goes to Daggett to prove Markle's claim. He takes a job with the mail company and starts nosing around. Someone at the company ...

Fred Powers is down on his luck and on the run when he meets up with Jess Harper. Jess and Slim Sherman help out the stranger by giving him a job and a place to stay, even after finding out that Fred has been dodging gunslingers out for the price on his head, put there by the father of a man he killed in a fair fight. Fred settles enough to start courting a local girl but the peace doesn't last and he is forced to go on the run again after Jess is beaten by a pair of gunmen looking for him. Not wanting to leave Laramie without saying good-bye to his girl he finds that...

Slim Sherman is on his way home when he is shanghaied to become Billy Pore, a convict to be delivered to the Tumbleweed Wagon that takes convicted men to prison. The real Billy Pore was shot by the farmer that was delivering him to the wagon and, desperate for $100 bounty on delivery, Slim becomes the substitute. Despite his denials, Slim is imprisoned with the rest of the men on the wagon, one of whom is expecting his gang to help him escape. Slim is in a race against time, desperate to have the marshal's believe him before the wagon is ambushed. His only hope is the...

Jess Harper is riding shotgun on an $30,000 Army payroll being shipped to Green River on the stage and using the old road through the dry lands proves to be an almost fatal mistake when Shelly Stack and his men bushwhack the stage, helped by Scotty the stage driver. In a fit of rage when Jess fights back, Stack takes everything off the stage and leaves Scotty, Jess and the passengers to die. Stripping what they can from the stage the five set off across the desert trailing Stack and his men. It's a perilous journey with no food, no water, no horses and no weapons but ...

Doc Longley is a wily old outlaw looking to live out his last years in peace where he grew up, which is Laramie. Someone in his gang doesn't want him to and they've framed him for the murder of the deputy sheriff in Laramie. With no one to trust Longley turns to Slim Sherman for help, to the dismay of the young rancher. Slim owes Longley his life having been saved by the outlaw when he was a boy. Longley has also threatened Jess Harper's life if Slim refuses. Caught between the law and the old outlaw, Slim has little choice but he'll only do it if Longley turns ...

Dixie Howard is on the run, one step ahead of a bounty hunter when he and his companion Julie stop in Laramie to pick up a supply of whiskey. Dixie is forced into a gunfight and he ends up killing one of the stage drivers. He's wounded and desperate for help, sending Julie to contact Jess Harper. Jess and Dixie rode together when Jess was young and he feels an obligation toward the man which puts him at odds with Slim Sherman, who's concerned that Jess doesn't see Dixie Howard for the killer he's become. Gradually Jess comes to realize that Dixie is no longer the man ...

The Sioux are raiding in the Laramie basin and making it dangerous for stage traffic to use the Laramie road. Slim Sherman suggests using the Old Laramie road until things settle down but the road needs repair. With Jess Harper off scouting for the Army, Slim manages to round up a odd assortment of citizens to work on the road but they find themselves under attack almost from the beginning and it's not by the Sioux. Someone in their small band is systematically picking them off one by one. Bad luck is dogging them at every turn as Slim tries to solve the mystery of ...

Slim Sherman is in town representing the stage line in a contract with Sheila Dawson for getting right of way through her property. She's the widow of an outlaw with no head for running a ranch and she's been having bad luck in keeping a foreman, with the current one in jail. Except he's actually an investigator for the stage company. He asks Slim to take the job of foreman because he's convinced that the money Sheila's husband stole and hid before he died is somewhere on the ranch. Slim takes the job but no one is what they seem from the hands to Sheila herself. As ...