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
William Conrad Dundy in the NBC radio series "The Adventures of Sam Spade" (1949–50); boss to government special agent Douglas Fairbanks Jr. in "The Silent Men" (NBC 1951); and a New Orleans bartender in the NBC adventure drama "Jason and the Golden Fleece" (1952–53). Most prominently, Conrad's deep, resonant voice was heard in the role of Marshal Matt Dillon on CBS Radio's gritty Western series "Gunsmoke" (April 26, 1952 – June 18, 1961). The producers originally rejected him for the part because of his ubiquitous presence on so many radio dramas and the familiarity of his voice, but his impressive audition could