The subject of Harris' ski vacation comes up again in The Architect (1980), when it turns out he is able to go to Wyoming after all. It is not specifically stated, but it is implied either that he and Dietrich worked something out, or Dietrich was required to give up vacation privileges as part of the punishment for participating in an anti-nuclear protest against department policy (in Dietrich's Arrest: Part 1 (1980) and Dietrich's Arrest: Part 2 (1980) ).
At the end of the episode Hal Linden looks right at the camera.
It's revealed by Wojo that he has a brother.