In 1961 this Western expanded to an hour; half-hour reruns began airing under the title "Marshal Dillon"
The radio series first aired on CBS on April 26, 1952 with the episode "
Billy the ..... From 1955 to 1961, Gunsmoke was a half-hour show (retitled 
Marshal Dillon in .... Encore Westerns aired this version under the Marshal Dillon 
title.