Patrick Duffy On Why He Owes Larry Hagman His Career

04/15/2013 03:35 pm ET

Tonight on "Dallas‘" two-hour season finale (TNT, 9 p.m. ET), viewers find out who shot J.R.(Larry Hagman), whether the Ewings can complete J.R.'s “masterpiece” to take down Cliff Barnes and Harris Ryland, and if Victoria Principal has returned as Christopher's mother, Pam.

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