It's a double-feature from Classic Radio Road Show, performed before a live audience. 

Gunsmoke represents the rarest of phenomena in the annals of radio and television. It not only ran for decades, but it also introduced to the public a cast of characters that gradually took on mythic proportions and forever became part of the popular consciousness. SuZanne and Gabor Barabas, the authors of the preeminent book on the history of both the radio and television versions of Gunsmoke, were on hand at this live performance to talk afterward about the series and answer questions.

Frontier Gentleman was one of several "adult westerns," along with Gunsmoke and others, that appeared on radio and television in the early 1950s. The genre was described as "grittier, more realistic", and clearly intended for an older audience. 

 Cast of Gunsmoke: 

Elaine Steelman as Kitty

Marcia Finn as Edna

Michael Bürgi as Chester

Brian Hotaling as Mitt Dillon

Anthony Aversano as Doc

Duane Noch as Hans Gruber

Sheldon Fallon as Mr. Jonas

Cast of Frontier Gentleman: 

Michael Bürgi as Announcer and C.B.

Brian Hotaling as Kendall

Marcia Finn as Black

Anthony Aversano as Charlie

Duane Noch as Beljoy

Sheldon and Roberta Fallon as Mr. & Mrs. Willis

Laurie Noch as Mercy Day

Elaine Steelman as Mrs. Beljoy