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The Dallas star died Nov. 23 at 81 after a one-year battle with throat cancer. The son of Broadway legend Mary Martin, Hagman got his breakthrough on I Dream of Jeannie in 1965 and became a TV icon 13 years later with his portrayal of the nefarious but beloved villain J.R. Ewing on Dallas. His character was at the center of one of television's biggest cliff-hangers after being shot by an unknown assailant, leading viewers to spend the summer of 1980 pondering, "Who shot J.R.?" The episode that revealed J.R.'s shooter is still among the highest-rated TV programs ever. Hagman reprised J.R. Ewing for TNT's reboot of Dallas and had completed six episodes of Season 2 at the time of his death.