Usually I am not a fan of celebrities appearing as exaggerated versions of themselves on TV shows (that probably explains why I dislike Entourage) but it would be hard to not like this classic episode of Just Shoot Me that saw Mark Hamill appear as himself. The scenes with Dennis were all memorable and I still quote them to this day.
There was also a great storyline with Jack and Elliot over a position on the most powerful men in New York list. Without spoiling it too much for the viewer, it featured some of the duo's better exchanges together.
Definitely a must-watch for Just Shoot Me fans.