text: Also appearing in many episodes are several background characters, including Bobby's secretaries Connie Brasher (portrayed by Donna Bullock in season 1, Ann Ford and Nancy Bleier in season 2, and Jeanna Michaels in season 2–4) and Phyllis Wapner (Deborah Tranelli, seasons 4–14); J.R.'s secretaries Louella Caraway Lee (Meg Gallagher, seasons 2–4) and Sly Lovegren (Deborah Rennard, seasons 5–14); Cliff's secretary Jackie Dugan (Sherril Lynn Rettino, seasons 2–5 and 7–14); Ewing Oil receptionist Kendall Chapman (Danone Simpson, seasons 6–14); Southfork maid Teresa (Roseanna Christiansen, seasons 6–14); and Oil Baron's Club staff Dora Mae (Pat Colbert, seasons 7–14), Cassie (Anne C. Lucas, seasons 5–10) and Debbie (Deborah Marie Taylor, seasons 11–14). Widely known supporting actor Tina Louise, played J.R.'s secretary, Julie Grey, during the first two seasons before her character was killed off.
  Main cast departures
  By the end of the series, only three of the series' original characters (J.R., Bobby, and Cliff) were left in Dallas, the others having either died or left town.
  Jock Ewing was the first main character to depart the series, as Jock died offscreen in a mysterious helicopter crash in South America, during season 5. Actor Jim Davis, who played Jock, had died just after production had completed on season 4 in 1981.
  Bobby Ewing's death in the season 8 finale, alongside his subsequent absence during the following season, was explained away at the beginning of season 10 as having been dreamed by Pamela, thus erasing everything that had happened during season 9. Patrick Duffy had left the series to pursue other opportunities, but due to declining ratings, he was convinced to return to the series by production company Lorimar as well as by series star Larry Hagman.