revision preference src: The first was on June 11, 1949, with Rye Billsbury as Dillon and the second on July 15, 1949, with Howard Culver in the lead. Neither pilot was aired and the hero's name was eventually changed from Mark Dillon to Dillon. <SEP> tgt: The first was on June 11, 1949, with Rye Billsbury as Dillon and the second on July 15, 1949, with Howard Culver in the lead. Neither pilot was aired and the hero's name was eventually changed from Mark Dillon to Matt Dillon.