John Ross "J.R." Ewing Jr. is a fictional character in the American television series "Dallas" (1978–1991) and its spin-offs, including the revived "Dallas" series (2012–2014). The character was portrayed by Larry Hagman from the series premiere in 1978 until his death in late 2012, and Hagman was the only actor who appeared in all 357 episodes of the original series. As the show's most famous character, J.R. has been central to many of the series' biggest storylines. He is depicted as a covetous, egocentric, manipulative and amoral oil baron with psychopathic tendencies, who is constantly plotting subterfuges to plunder his foes' wealth. In the PBS series "Pioneers of Television", Hagman claimed the character of J.R. began its development when he played a similar character in the film "Stardust", and that he was also inspired by a mean boss he once had.