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) (season 9) aired the three-hour-long telefilm prequel "", the only "Dallas" movie made during the series' original run. Written by series creator David Jacobs, the film was introduced by Larry Hagman in the role of J.R., and starred David Marshall Grant, Dale Midkiff and Molly Hagan as the young Digger Barnes, Jock Ewing and Ellie Southworth Ewing, respectively. Taking place between 1933 and 1951, the film dealt with the creation of Ewing Oil and the origins of the Barnes – Ewing feud. <onlyinclude></onlyinclude> Dallas (1978 TV series) (season 9) The ninth season of the television series "Dallas" aired on CBS during the