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.
Larry Hagman his return in the fourth season. Holding out for a higher salary, Hagman did not appear in the first episode of the show until the final few minutes. Producers were faced with a dilemma whether to pay the greatly increased salary or to write J.R. out of the program. Lorimar Productions, the makers of the series, began shooting different scenes of "Dallas" which did not include Hagman. In the midst of negotiations, Hagman took his family to London for their July vacation. He continued to fight for his demands and network executives conceded that they wanted J.R. to remain on