The cast of the radio version was completely different than the television version. Playing the main roles were William Conrad as Marshal Matt Dillon, Georgia Ellis as Miss Kitty Russell, Howard McNear as Doc Adams, and Parley Baer as Chester. In fact, with the exception of Conrad, many felt that the radio cast were going to reprise their roles on the televised version.
Dr. Galen 'Doc' Adams:
I'll tell you why the Hagens live so long.
Festus Haggen: Why?
Dr. Galen 'Doc' Adams: 'Cause they're too dumb to know they're dead!
Most of the social, racial and political attitudes expressed by the characters during the series reflect the 1950s thru 1970s airing of the series rather than its 1870s/1880s setting.