Love thy neighbor. Words to live by for Sid's sexy sister Abby Cunningham --especially with the male neighbors in her new hometown, Knots Landing. Maybe it's Abby's influence, but bed-hopping becomes the latest cul-de-sac sport. Who cheats? It's simpler to list who doesn't in the sizzling 4-disc Season 2 set of the long-running hit series. And there's a lot more excitement: J.R. and Bobby Ewing swap Texas drilling for California dreamin