Complex sentence: Throughout the 1980s, Corbett was a regular cast member in the long-running television series "Dallas" playing Paul Morgan on the series from 1983--1984 and then from 1986--1988.
Split into simpler sentences: Throughout the 1980s, Corbett stayed busy being a cast regular in the long-running television series "Dallas". Corbett played Paul Morgan on the television series from 1983--1984 and then from 1986--1988.