Both Gunsmoke and Lassie were on TV together until the cancellation of the latter paved the way for Gunsmoke to earn the record for the highest number of scripted episodes for any U.S. primetime, live-action TV series. To learn which animated show surpassed Gunsmoke by airing even more episodes, please watch the video above.

10 Facts About The Cult-Western Series 'Gunsmoke'