In 1961 this Western expanded to an hour; half-hour reruns began airing under the title "Marshal Dillon"
of seasons, 6 ('Marshal Dillon', syndication re-titling of half-hour episodes) ..... 
episodes of Gunsmoke expanded to an hour in Fall 1961, CBS-TV reran the half-
hour ... Encore Westerns currently airs this version under the Marshal Dillon title.