At Halloween, rustlers take advantage of the seasonal disguises to raid a cattle ranch. Lucas' faith in his son's honesty is shaken when he hears rumors of Mark being mixed up with the thieves.
While trapped in the ghost town saloon, Lucas tries to come up with a plan to escape with his son and Micah after Mark refuses to leave without him.
When Lucas, Mark, and Micah get lost in Old Mexico, they are held hostage by a group of bandits who intend to kill the men and take Mark as a slave.
A former neighbor of the McCains' is released from jail after serving his sentence for robbery. Lucas lets the man work for him but the new hand holds a secret.
Lucas develops temporary amnesia from a head injury while visiting a strange town and mistakenly assumes the identity of a wanted criminal.
A handsome gambler moves into town and begins wooing Milly Scott, claiming to have known her deceased brother.
Lucas is torn by conflicting emotions when he meets the town's new preacher, a former outlaw whom the Rifleman vowed to kill.
No one is more surprised than Micah when newcomer Leota Carraway claims he's her long-lost husband and the father of her child.
A lawman's irrational jealousy threatens not only to destroy his marriage but also to make him a target.
Mark befriends singer-banjoist Lafayette Bly, a blind man with an acute sense of hearing and a very strong grip.
Mark and Milly are shocked when Lucas begins gambling. They don't know that Lucas is "undercover" trying to catch a man cheating.
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.
Tip Corey, the son of a man allegedly murdered in North Fork, has a killer's reputation and comes to town to kill Micah.
Lou Mallory arrives in North Fork and starts buying up land and businesses. Lou and Lucas start disliking each other after she reveals plans to build a railroad on "worthless" land.
While trapped in the ghost town saloon, Lucas tries to come up with a plan to escape with his son and Micah after Mark refuses to leave without him.
A former neighbor of the McCains' is released from jail after serving his sentence for robbery. Lucas lets the man work for him but the new hand holds a secret.
Lucas develops temporary amnesia from a head injury while visiting a strange town and mistakenly assumes the identity of a wanted criminal.
A handsome gambler moves into town and begins wooing Milly Scott, claiming to have known her deceased brother.
The town of North Fork becomes a haven for outlaws when suave Ben Judson smooth-talks his way into the marshal's job.
Lucas is torn by conflicting emotions when he meets the town's new preacher, a former outlaw whom the Rifleman vowed to kill.