Bonanza - Season 3 - Eps 28: The Crucible
Adam is left to die in the desert after two thieves take $5,000 and his horse from him. Near death, he stumbles into an old prospector named Kane who offers to lend him a mule and supplies in exchange for three day's work at his mine. Kane, however, turns out to be a demented madman. He holds Adam prisoner and tortures him to prove his theory that anyone could be driven to kill, even a man as rational as Adam. This is Pernell Robert's favorite episode along with "The Wooing Of Abigail Jones".
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