Bonanza - Season 9 - Eps 21: The Crime of Johnny Mule
Hoss stands alone in refusing to convict Johnny Mule, a ""slow"" ranch hand who is accused of robbing and murdering his boss. So when Johnny Mule - fearing he'll be lynched, regardless of the verdict - escapes from jail during jury deliberations, it's Hoss who takes the heat.
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