Blackmail

S5 E23: Bobby Ewing's worst fears are realized when Farraday is murdered but a much worse blackmailer takes his place, his brother, J.R. With copies of Christopher's adoption records in his possession, J.R. realizes that he is probably the real father and now he can force Bobby to do his will so that Pam will never find out. J.R. also believes he will soon have a clear field to get Sue Ellen back with Clayton Farlow leaving town and Cliff Barnes well on the road to ruin. Donna faces Miss Ellie with her findings on Jock's early career and a deep rift is created between the two women.