[Art in Idaho]

"Premiering on CBS in September 1955 and completing its network run September 1975, Gunsmoke is the longest running dramatic series in the history of television. Two of its stars, James Arness and Milburn Stone, remained all 20 seasons, with Amanda Blake a close second, departing after 19 years."

[BerryDingle]

Another actor remained all 20 seasons, Howard Culver as Howie Uzzell, the Dodge House clerk. George Walsh was the original radio announcer for Gunsmoke and remained as the TV announcer for all 20 seasons.