Karen MacKenzie record for an actress on American primetime television. Karen's storylines focus on family troubles, addiction and kidnapping. In her early years on the serial, the character had much more of an "edge" in order to test the audience on who would be the most like J. R. Ewing (Larry Hagman), the primary character of its parent series "Dallas". (The bad girl role would later be taken on by Abby Cunningham, Karen's sister-in-law.) Over time, she became much more of a wholesome character. Series creator David Jacobs said "Karen is the tent pole. She says the things I want to say.
Dallas (1978 TV series) "Dallas" from 1985–1987. Hagman later denied any involvement in Rambo's dismissal from "Dallas". Pamela Barnes Ewing was severely burned after driving a car into an oil tanker, which then exploded into flames, in the season 10 finale in 1987. During season 11, Pam disappeared after her half-sister Katherine Wentworth was seen around the hospital, with Pam seemingly leaving Bobby and Christopher due to her unwillingness to let them see her in such a physically disfigured fashion. While Victoria Principal never returned to "Dallas" again after the season 10 finale, Margaret Michaels, a Principal look-alike, played Pam in the opening episode