Outlaws take Mark hostage in order to force Lucas to help them rob the bank in North Fork.

Lucas and Mark interrupt two young men stealing horses. Lucas is forced to defend himself and shoots and kills one of the men. He is one of Ma Boyle's sons. The Boyles are a mountain family who live by their own laws and Micah foresees trouble. When the clan arrives in town they are set on hanging the man responsible for the killing.

Seven escaped prisoners terrorize the town of North Fork. The leader has a personal grudge against Lucas McCain that he must settle before leaving the town.

A quick-talking salesman discovers gold on Lucas' property and tries to fleece McCain of the mineral rights on his ranch.

When Micah is badly injured by an escaping prisoner, Lucas tracks the prisoner back to his home town where they do not give up their own.

In Micah's absence, Lucas is forced into a duel to determine to which system of justice the blatant murder of a rural Hispanic resident applies: the old justice of traditional New Mexico Hispanics, administered by "Baranca", or the US law.

A Cavalry captain discovers that a son has been an outlaw who was killed by Lucas. He is determined to punish Lucas for the tragedy.

Milly Scott buys Hattie's general store. Her background as a schoolteacher does little to prepare her for what she bought into when she hires a stranger in town to collect all the debts owed to the store.

According to the stipulations in a bizarre will, the citizens of North Fork will divide $100,000 if Lucas McCain dies within seven days of Sarah Caruthers. The vicious old woman has hated Lucas ever since he killed her husband during a robbery.

A strict new schoolmaster comes to teach - and, he discovers, to learn: from Mark and Lucas.

A con man and his fast-gun friend come to North Fork. Lucas enters a target shooting contest.

When a famous New York artist is sent to paint a portrait of Hannah Shaw, they find the artist is not longer the person they were requesting. Lucas will try to help the down-on-his-luck artist.

Mark and Lucas help a young man muted by a traumatic past.

Heading home on a stagecoach, Mark and Lucas are entertained by a little old lady's stories of gunslingers and her scrapbook of wanted posters. Little do they know she's a bounty hunter with her sights set on Duke Jennings, who's headed to Northfork.

Mark comes riding into North Fork in a hurry. He has been sent by Lucas to get Dr. Burrage. He knocks, but does not find the doctor in his office. Two strangers who are planning to kill Dr. Burrage are standing nearby.

A book salesman gives flower seeds to a woman whose husband is away from home. He then covers her mouth with one of his hands as she tries to scream for help.

Micah and Lucas are escorting Stanley, a prisoner, across a vast area with no towns anywhere nearby. After Stanley scares away the three horses, Micah, Lucas, and Stanley start walking, and walking, and walking.

Lucas fulfills the dying wish for an old friend.

When he sees the face of a young man who is calling him out, Lucas experiences a shocking flashback to his civil war days.

After his herd is wiped out by hoof-and-mouth disease, McCain agrees to serve as an undercover detective for the U.S. government in order to raise enough cash to buy more cattle. He travels to Wyoming to learn the source of the repeating rifles that have fallen into the hands of rebellious Cheyenne Indians.

Lucas continues his undercover assignment - searching for the source of repeating rifles that have fallen into the hands of renegade Indians. Meanwhile McCain's absence is keenly felt back in North Fork.

When Micah's recurring nightmares drives him back to drunkenness, Lucas decides that the marshal must confront the source of those nightmares - a gunslinger he failed to face down sixteen years before.

The Newmans are still living in the town where Micah grew up. Their plan to strike it rich are smothered by a long forgotten family secret - which Mark is about to uncover.

Lucas is temporarily blinded in an explosion. Unfortunately, not long after that incident an old enemy of his rides into town, looking to settle an old score.

Major Aaron King and Corporal Troc arrive in North Fork on horseback. When they see Lucas, they remember that he was a Lt. in the Union Army fifteen years ago. They see this chance meeting as a lucky break.

Cade Conway and Vashti Croxton are arguing about where to get married. This leads to a fight and Vashti being knocked unconscious, and a traveling salesman being falsely blamed for it.

On his way through a strange little town, Lucas is arrested and accused of being a horse thief.

Clarence, Millie's mop boy, is wearing a gun he just cleaned for a customer. When he accidentally kills a famous outlaw, some locals play up their new friend's reputation hoping for more fun as they expect his partner to come to town.

Even though badly wounded Lucas is set on bringing two murderers to justice. The trip will be dangerous for both Mark and Lucas.

Lucas serves as the foreman of a jury that finds a Mescalero Indian guilty of murder. The man's father, a renegade witch doctor, places a curse on the Rifleman predicting his death before the next new moon.

Lucas and Mark are in the barn. Outside a snowstorm is raging and the wind is howling. After they reach the house, they hear Scotty, the driver on a stagecoach. He asks to spend the night. The stagecoach passengers are also invited into the McCain home.

A stagecoach arrives in North Fork, the door opens, and out steps a woman. In talking with her, Micah finds out that she has come to marry Lucas.

A gunfight with an unwilling participant brings a need for a doctor, but Doc Burrage is out of town. A doctor passing through North Fork volunteers to help. However, he and Lucas have a past, and not a good one.

The efforts of a Chinese man and his son to establish a laundry are hindered by two louts who resent foreigners in North Fork.