Sid was played by Don Murray. Wasn't he in the Love Bug movie? You are right about the cause of Sid's death. However Don wanted out of the show because he felt like he was becoming a supporting character.
The Walsh parents were very cool. It was also nice that they allowed Brandon to turn the house in Beverly Hills into a swinging bachelor pad complete with pinball machines when they left for Japan or wherever they left to.
Yes Jock from Dallas. Poor Jim Davis getting sick so early on in the show. Did you know his Lincoln is on permanent display at Southfork and you can tour the mansion?