 Principal landed the role of, Pamela Barnes Ewing, on the long-running prime time TV soap opera series "Dallas" that aired on the CBS network from 1978 to 1991.Patrick Duffy, who would play Pamela's on-screen love, knew the part was ideal for Principal the minute he set his eyes on her.He recalled that one of the finalists for Pamela "was a remarkably talented young actress from New York...[who was] really good.