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 him by legendary actor James Stewart: "Jimmy said he was in the office with Charles Warren when Mr. Wayne came in. Mr. Warren asked Wayne if he knew James Arness, and Mr. Wayne said yes. Mr. Warren told Mr. Wayne about the transition of the show from radio to TV, and Mr. Wayne readily agreed that James Arness would be a terrific choice for the part of Matt Dillon. I have no reason to doubt the story, because Jimmy absolutely knew everybody." In the end, the primary roles were all recast, with Arness taking the lead role of Marshal Matt