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.
A former army captain comes to North Fork to kill the man who shot down his son in a gunfight - Lucas McCain.
When an outlaw leader lures Marshall Torrance out of town, Only Lucas can stop him from lynching a local man.
Lucas tracks an escaped prisoner to a town that turns out to be run by the gunman's brother who is notorious for shooting people in the back.
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.
Lucas shoots a horse thief who turns out to be a member of the Boyle clan. Now Ma Boyle is after him.
Lucas is out for vengeance when Mark is used as a pawn in a bank robbery scheme.
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.
Mark and his friend become trapped in an old mine.
The widow of a bandit killed by Lucas plots a grotesque revenge.
A new store owner upsets the town by demanding all credit accounts be paid off.
A former army captain comes to North Fork to kill the man who shot down his son in a gunfight - Lucas McCain.
Lucas tracks an escaped prisoner to a town that turns out to be run by the gunman's brother who is notorious for shooting people in the back.
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.
Seven condemned murderers escape and take over the town of North Fork.