David Ackroyd (born May 30, 1940) originated the role of Gary Ewing on the CBS-TV series Dallas, the embittered younger brother of J.R. Ewing, and big brothor of Bobby Ewing in the two-episode season opening story arc of Season 2, the episodes "Reunion: Part I" and "Reunion: Part II"; the part was later assumed by Ted Shackelford in Season 3, as he would later assume the role again in Dallas's spinoff, Knots Landing for the duration of its network TV run on CBS.