Bonanza - Season 12 - Eps 6: Gideon, the Good
On the trail, Joe witnesses a woman kill a man, but the woman rides away before he can positively identify her. He rides into the nearest town, Black River and reports the crime to Sheriff Gideon Yates, and the two ride out to find clues. They find a handkerchief embroidered with the letter "L". Sheriff Yates knows who the killer is, his wife Lydia. She married him before she got a legal divorce from her first husband, Loomis, and killed him to silence him. Gideon tries to coax Joe out of town, but he recognizes Lydia's picture in a photographer's window. When Joe refuses to leave, Gideon tries to shoot him down in cold blood and orders a manhunt against him. Joe's only hope is a Mexican stable boy, who saw Gideon shoot him, and ultimately Joe and Gideon have one of the most memorable confrontations in the series' history.
About Bonanza

Title: Bonanza
First Air Date: 1959-09-12
Last Air Date: 1973-01-16
Status: Ended
Rating: 7.516/10 (from 441 votes)
Language: EN
Seasons: 14
Total Episodes: 431
Network: NBC
Genres: Western, Action & Adventure, Drama, Family
Production Companies: NBC, NBC Studios
Synopsis
The High-Sierra adventures of Ben Cartwright and his sons as they run and defend their ranch while helping the surrounding community.
Cast

Lorne Greene
Ben Cartwright

Michael Landon
Joe Cartwright

David Canary
Candy Canaday

Tim Matheson
Griff King

Mitch Vogel
Jamie Hunter Cartwright