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 chief, Hubell Robinson, to develop a hardboiled Western series, a show about a "Philip Marlowe of the Old West". Robinson instructed his West Coast CBS Vice President, Harry Ackerman, who had developed the "Philip Marlowe" series, to take on the task. Ackerman and his scriptwriters, Mort Fine and David Friedkin, created an audition script called "Mark Dillon Goes to Gouge Eye" based on one of their Michael Shayne radio scripts, "The Crooked Wheel". Two auditions were created in 1949. The first was very much like a hardboiled detective series and starred Michael Rye (credited as Rye Billsbury) as Dillon; the