First and foremost, Dallas in its original run was from the 1970s to the 1990s ( - just like its spin-off Knots Landing was from the 1970s to the 1990s also.) (For example, EastEnders had the Den/Angie divorce papers in the 1980s and EastEnders also had the Sharongate AND River Thames Crash storylines with The Mitchell Brothers no longer being close anymore due to falling out over sleeping with each others wives, who were the 2 original female characters Sharon and Kathy and how Sharon and Kathy both each said they thought "maybe they'd married the wrong brother". ) You may perhaps have remembered a first/initial scene during the 1989-1990 season of Dallas that had some sort of repercussion or facilitated a storyline within that particular season? I mean it could have been a clever crux or something and could have potentially challenged/rivalled the "Who Shot J.R?" of 1979-1980?