Complex sentence: He began acting on television in (1958) "Flight", and in 50 episodes (1962-1965) as Quint Asper, Dodge City Blacksmith on "Gunsmoke", and made his breakout film role in "Deliverance" (1972).
Split into simpler sentences: He began acting on television in 1958 in the series "Flight", then went on to appear in 50 episodes of "Gunsmoke" (1962-1965) as Quint Asper, the blacksmith of Dodge City. He made his breakout film role in "Deliverance" (1972).