text: Ian McShane (season 12) as Don Lockwood, an English film producer who becomes Sue Ellen's second husband;
  Gayle Hunnicutt (seasons 12–14) as Vanessa Beaumont, mother of James and J.R.'s sweetheart, later temporarily his fiancé.
  Longtime child characters include J.R. and Sue Ellen's son John Ross Ewing III (portrayed for seasons 4–6 by Tyler Banks, and for seasons 7–14 by Omri Katz); Bobby and Pam's adopted son Christopher Ewing (portrayed by Eric Farlow for seasons 6–8, and by Joshua Harris for seasons 9–14), and Jenna's daughter Charlotte "Charlie" Wade (Shalane McCall, seasons 7–11, also played by Laurie Lynn Myers for a season 2 episode).
  Among the most frequently appearing business associates of the Ewing family are oil cartel members Jordan Lee (Don Starr, seasons 2–14), Marilee Stone (Fern Fitzgerald, seasons 2–13) and Andy Bradley (Paul Sorensen, seasons 2–10); Jock's good friend Marvin "Punk" Anderson (Morgan Woodward, seasons 4–11) and his wife Mavis (Alice Hirson, seasons 6–7 and 10–11); and shady investment banker Vaughn Leland (Dennis Patrick seasons 3, 5, 7–8). Other longtime Ewing acquaintances include Dallas PD detective Harry McSween, serving as J.R.'s source within police force (James Brown, seasons 2–12); family attorney Harv Smithfield (George O. Petrie, seasons 3–14); and Donna's stepson, U.S. Senator Dave Culver (Tom Fuccello, seasons 3–6, 8, 10–11 and 13–14).