Norman Macdonnell an anthology series they had done. Their boss at CBS, Harry Ackerman, and other network executives dismissed that title, preferring "Gunsmoke", a program heading that Ackerman himself was credited with conceiving. Once given permission to proceed with "Gunsmoke", Macdonnell began developing a detailed production schedule for the new series' 30-minute episodes and arranging auditions to cast its recurring characters. His and Meston’s "Jeff Spain" soon became United States Marshal Matt Dillon, and veteran voice actor William Conrad was chosen by Macdonnell, Meston, and two other CBS screeners to portray that lead character. Other seasoned actors soon filled the needed regular
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