Gunsmoke - Season 20 - Eps 10: In Performance of Duty
Matt is frustrated by Judge Kendall's insistence that the letter of the law be maintained, which could result in Emmett Kaysinger and his boys, all known outlaws, be set free unless there is solid evidence to hold them for a double murder and robbery they committed.
About Gunsmoke

Title: Gunsmoke
First Air Date: 1955-09-10
Last Air Date: 1975-03-31
Status: Ended
Rating: 6.6/10 (from 102 votes)
Language: EN
Seasons: 21
Total Episodes: 635
Network: CBS
Genres: Western, Action & Adventure, Drama
Production Companies: Filmaster Productions, Arness Production Company, CBS
Synopsis
Gunsmoke is an American radio and television Western drama series created by director Norman MacDonnell and writer John Meston. The stories take place in and around Dodge City, Kansas, during the settlement of the American West. The central character is lawman Marshal Matt Dillon, played by William Conrad on radio and James Arness on television.
Cast

James Arness
Marshal Matt Dillon

Amanda Blake
Kitty

Ken Curtis
Festus

Milburn Stone
Doc

Woody Chambliss
Woody Lathrop