Gunsmoke actor Ken Curtis joined the cast as Festus Haggen after initially beginning his career as a singer. Next, he moved into film, starring in John Ford movies, such as The Searchers, Rio Grande, and The Quiet Man. Curtis later found a home in the Gunsmoke cast, where he remained until the show was canceled after season 20. He fit nicely into the overall atmosphere of the set. However, he had one episode that beat them all and further strengthened his bond with co-star Milburn Stone.

‘Gunsmoke’ actor Ken Curtis evolved Festus Haggen

'Gunsmoke' actors Ken Curtis and Milburn Stone in a black-and-white picture giving exaggerated expressions to each other. They're both wearing suits and ties.
L-R: Ken Curtis and Milburn Stone | Phil Slattery/The Denver Post via Getty Images

Curtis didn’t join Gunsmoke as Festus until season 8 episode 13 – “Us Haggens.” James Arness’ U.S. Marshal Matt Dillon and the audience didn’t initially know what to make of Festus. He came to Dodge City to avenge the death of his twin brother at the hands of his uncle. Nevertheless, Festus became close friends with Matt to the point of becoming deputy marshal.