On the road Lucas and Mark come upon Winslow Quince, a peddler whose wagon has broken down, and help him get his wagon into North Fork for repair. While in North Fork Quince barters several items that implicate him in a series of murders.
John Gangling, a railroad gang boss, gives out wages to the workmen. Charlie Breen, a man known to save his money, gets his wages and goes off to add them to his money belt. Gangling follows Breen because he wants Breen's savings. Gangling kills him, and then puts the blame on Johnny Wing, one of the Apache workers, ''moreless
Nils Swenson, North Fork's blacksmith, volunteers to take the marshal's place for a few days while Micah attends a wedding in another town. To help maintain peace, Nils institutes a policy that anyone coming into town must turn in their weapons, getting them back when they leave. This plan backfires on Nils when some dishonest men are in town.moreless
Businesswoman Lou Mallory has arrived in North Fork and quickly purchases land, which includes the hotel and Milly Scott's store. She pays higher prices than the sellers feel their properties are worth. Everyone is happy until they find out that Lou really is an astute businesswoman.
Marshal Torrance is heading home from a cattle sale with Lucas and Mark when the old lawman mysteriously disappears. They trace him to a nearby Mexican ghost town. (Part 1 of 2)
A professional card player, John Keeler, has set up business in North Fork, but local Jesse Phillips claims that this tinhorn is a cheat. Lucas starts playing poker with Keeler to draw him out.
Lucas and Mark stop on the way to the county fair to deliver a message to Micah, who is on the trail escorting a prisoner scheduled to be hanged. Mark and Lucas recognize the prisoner, Mr. Renolds, as someone who saved Mark's life from a snake bite a few years back. Mark feels that he owes Mr. Renolds a debt.moreless
On the trail Len Richards and his brother, Ab, confront a Lucas McCain look-alike, Earl Bantry and his sidekick K.C. Peters, for slaughtering one of Richards' steers. Bantry kills Ab Richards, and Len wants Micah to arrest Lucas for the murder. More problems ensue because of this "evil twin."
Micah has an infamous outlaw, Charlie Gordo, in his jail waiting for the U.S. marshal from Denver to take Gordo to the Yuma prison for hanging. With the arrival of the stage, Micah finds that the lawman has been killed, and he has to look to his friends to defend the jail from Gordo's gang.moreless
Two prison wagon drivers stop at the McCain ranch looking for whiskey. Lucas turns them down because they are escorting Rudy Croft, a murderer, to be hanged in Yuma. That evening Croft escapes, and the drivers know they need a substitute for the escaped prisoner. They return to the ranch and take Lucas in Croft's place.moreless
While Lucas and Mark are traveling across the Mexican desert they encounter a trio of Mexican bandits. They demand payment from Lucas for crossing "their" desert. Lucas refuses. In retaliation, the three slam Lucas in the throat with his rifle, strip him of all his possessions (including Mark), tie him to a tree, and leave him to die of thirst and exposure.moreless
Lucas and Mark are in another town to sell a bull to Joe Lovering. Mark wants to buy two horses from Mr. Schneider for $25 each. Schneider, wanting to leave town in a hurry, sells the horses to Mark. Neither Mark nor his father knows that the horses have been illegally bought and now resold to them. When the posse encounters them on the road, Lucas has a hard time explaining the two horses that Mark bought in spite of the bill of sale.''moreless
Two ex-Confederate officers seek revenge on Lucas. McCain was a lieutenant in the 8th Indiana which defeated the 12th Cavalry 15 years earlier at the Battle of Fort Donaldson. The Confederate officers were in the 12th Cavalry, and their defeated regiment was sent to a prisoner-of-war camp for two years. They were the only two of their regiment who survived the internment. They blame Lucas for the imprisonment and the death of their fellow soldiers.moreless
Mark stays with Miss Milly, while Lucas is in Wyoming on the trail of a gang illegally selling weapons to the Indians. Mark suffers from loneliness and doubt while his father is gone for 2 months. (Part 2 of 2)
Lucas agrees to take a job as a federal undercover agent and goes to Wyoming to investigate rumors of sales of arms to renegade indians. His life is endagered by the town drunk who stumbles onto his true identity and purpose. (Part 1 of 2)
When an outlaw leader lures Marshal Torrance out of town, Lucas is the only one who can stop him from lynching a local man who killed one of the members of his gang.
When Mark finds gold on their property, a fast-talking salesman who tried to sell Lucas a new lightning rod offers instead to buy the ranch's mineral rights.