S7, E20: Sue Ellen leaves the hospital unsure of who got her pregnant. J.R. and Peter are each convinced that he fathered the child Sue Ellen lost in the accident. Bobby, who is having his own dobuts about Charlie's parentage, realizes the subject is hanging between him and Jenna. J.R. makes Marilee have second thoughts about becoming Cliff's partner and Clayton bows out of the offshore venture with the Ewings.