While Lucas is in Wyoming on the trail of a gang illegally selling weapons to the Indians, Mark stays with Miss Milly, where he suffers from loneliness and doubt with his father gone for 2 months.
Lucas agrees to take a job as an undercover agent and goes to investigate rumors of the sales of arms to renegade Indians. His life is endangered by the town drunk who stumbles onto his true identity.
Lucas thinks he has seen a ghost when a man, eerily similar to a man he killed, challenges him to a gunfight.
Lucas and Marshall Torrance run into trouble while transporting a captured killer back to face trial.
Lucas unmasks a killer posing as a door-to-door seed salesman.
Mark and his girlfriend discover that an old hermit is very lonely. Old Tony invites them to lunch and lets them look for arrowheads on a remote part of his land.
The lazy Jackman brothers mortgage has been foreclosed. Unfit for farming, they head to a nearby town.
Mario Arsatti claims to be an acquaintance of a friend from Lucas' past. But he has been hired to kill Lucas.
Mark is injured in an accident, leaving his legs paralyzed. At the doctor's suggestion, Lucas and Mark set out on a trek to Mission Springs.
Lucas is baffled when the marshal of a neighboring town refuses to hold a gambler who just attempted murder.
While Mark goes hunting for Old Spike, Lucas goes hunting for his mortal enemy. Lucas is thrown into jail to stop him from murdering his former friend.
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.
The first railroad train is coming to the North Fork station. On board is a Japanese nobleman visiting the US.
Gridley Mau, the son of a man Lucas killed during an attempted robbery, comes to North Fork looking for revenge.
Lucas and Mark come upon Winslow Quince, a peddler whose wagon has broken down. They help him bring his wagon to North Fork for repair.
Lucas's self-confidence begins to slip away when he misses an easy shot that could have cost Mark his life.
Nils Swenson takes the marshal's place for a few days while Micah is away. To maintain peace, Nils insists that anyone coming into town must turn in their weapons.
Lucas shoots a horse thief who turns out to be a member of the Boyle clan. Now Ma Boyle is after him.
Mark and his girlfriend discover that an old hermit is very lonely. Old Tony invites them to lunch and lets them look for arrowheads on a remote part of his land.
The lazy Jackman brothers mortgage has been foreclosed. Unfit for farming, they head to a nearby town.