Larry Hagman was briefly replaced by Donna Reed for the 1984–1985 season, before Bel Geddes returned in better health for the 1985–1986 season. By the end of its 14th season in 1991, ratings had slipped to the extent that CBS decided to end "Dallas". Hagman was the only actor to appear in all 357 episodes. He had also made five guest appearances on the "Dallas" spin-off series "Knots Landing" in the early 1980s. Some years after "Dallas" ended, Hagman appeared in two subsequent "Dallas" television movies: "" in 1996, and "" in 1998. Hagman reprised his role as J.R. Ewing in TNT's
Dallas (1978 TV series) episodes: Larry Hagman (seasons 3-14), Patrick Duffy (seasons 4-8 and 10-14), Linda Gray (seasons 9-12), Steve Kanaly (seasons 10-12) and Ken Kercheval (seasons 13-14). "Dallas" originally aired on Saturday nights when it debuted as a regular series. Within a month, the show was moved to Sunday nights, where it would stay until halfway through the season, when it took a Friday-night slot. "Dallas" remained on Fridays until the show ended in 1991, alternating between 9 p.m. and 10 p.m. airings. The "Who Done It" episode of "Dallas" that revealed who shot J.R.?, the famous 1980 cliffhanger, received the highest domestic