The Unexpected

S7, E24: Clayton's sister, Jessica, arrives at Southfork for her brother and Ellie's wedding loaded with gifts but lacking the customary good thoughts. J.R. is especially impressed by Jessica and her present to him -- her late husband's regimental sword. Pam makes the decision to marry Mark out of pity and a triumphant Katherine demands that J.R. give her the tapes he has been using to blackmail her. Bobby is unable to wish Pam luck and admits to Jenna how he is torn between his feelings for Pam and his need to hold onto her and Charlie.