Season 1
01. Nichols
A retired soldier tired of guns returns to his family homestead in Arizona only to be forced to assume the position of local sheriff.
02. The Siege
A bandit gang rides in from Mexico in search of a dentist for its leader.
03. The Indian Giver
An Indian claims the Ketchams' land.
04. Paper Badge
Nichols welcomes a would-be actress to town, while Ketcham is infuriated by a booksmart lawman.
05. Gulley vs Hansen
Two aging gunfighters are pressured into a final showdown.
06. Deer Crossing
Ketcham angers the Apaches when he tries to force a brave to end his hunt for a prize buck.
07. The Specialists
Nichols and Ketcham hire second-rate mercenaries for an attack on an outlaw stronghold.
08. Peanuts and Crackerjacks
A baseball game between a visiting Army team and the town's team becomes a betting event.
09. Ketcham Power
Ketcham is made a deputy and promptly abuses his authority.
10. Bertha
After twenty years in a school back east Bertha's daughter is coming to town. Bertha plans to close down and become "respectable" during her daughter's visit, but instead Nichols convinces her to let him run her place while she's "gone".
11. The One Eyed Mule's Time Has Come
An earthquake traps Nichols in a cellar with an Army vet and his mule while looters rampage around them.
12. Away the Rolling River
An old bandit has his eye on one last prize: a money train.
13. Where Did Everybody Go?
A jealous boyfriend and his hulking brothers are after Nichols when he flirts with a temptress.
14. The Marrying Fool
A man comes to town looking to kill Ruth's fiance, who hasn't told her everything about his past.
15. Eddie Joe
A black fugitive hits town with a vengeful former cellmate close behind.
16. Zachariah
Nichols races a con artist uncle to find a hidden stash of money.
17. The Unholy Alliance
Thieves mistake Nichols for a top safecracker and force him into their latest crime.
18. Slight of Hand
A con artist talks the townspeople into investing in a gold mine.
19. Wings of an Angel
Nichols and a daredevil pilot search for killers.
20. About Jessie James
Nichols sets out to catch Jesse James and collect the reward.
21. Fight of the Century
Nichols is forced into the ring with a professional boxer.
22. Man's Best Enemy
An accused killer escapes when Nichols is distracted by a barking dog.
23. Wonder Fizz Flies Again
Nichols and his pilot friend team up once more, this time to rescue a kidnapped girl.
24. All in the Family
When Nichols is killed, his identical brother comes to town to avenge his murder.