Gunsmoke was the Western TV show that made Burt Reynolds a star, but the '70s icon left the series after just 3 years. 'Gunsmoke remains one of the longest-running television series in history and was popular well before Reynolds was made part of the cast by following Marshal Dillon (James Arness) as he attempts to keep lawlessness from sweeping over Kansas. It started in 1955 and the actor joined the cast in 1962 playing Quint Asper, a half-Comanche blacksmith that ended up appearing in 50 episodes between then and 1965 when he decided to leave.
https://screenrant.com/why-burt-reynolds-left-gunsmoke-show/