John Meston and refined the main characters who would populate his and Macdonnell's radio portrayal of Dodge. Jeff Spain soon became United States Marshal Matt Dillon, and veteran voice actor William Conrad was chosen by Meston, Macdonnell, and two other network audition judges to be the lawman and the series' central figure. Other seasoned actors filled the needed regular supporting roles, including Parley Baer as Marshal Dillon's trusty assistant Chester Proudfoot, Howard McNear as Dr. Charles "Doc" Adams, and Georgia Ellis, whose role in the series' early episodes would quickly evolve into the saloon "hostess" Kitty Russell. "Gunsmoke" was broadcast for the
Gunsmoke radio episode "Billy the Kid" (April 26, 1952) as "Francie Richards", a former girlfriend of Matt Dillon and the widow of a criminal. "Miss Kitty" did not appear until the May 10, 1952, episode "Jaliscoe". Kitty's profession was hinted at, but never explicit; in a 1953 interview with "Time," Macdonnell declared, "Kitty is just someone Matt has to visit every once in a while". The magazine observed that she is "obviously not selling chocolate bars". An out-take from the program makes this hilariously obvious. The television show first portrayed Kitty as a saloon employee (dance-hall girl/prostitute), then from season 3