Harris has been in so many roles, it's damn near impossible to remember them all. There are three which stick out for me. First is in Stuart Saves His Family, where he was Stewart's father. Second is as the Judge in Ghostbusters 2. Third, and most memorable, is in the Star Trek: Deep Space 9 episode "Duet". It doesn't matter what they tried after that - and they did some great stuff - that episode remains the very best, and it was a two person character piece between him and Nana Visitor's Kira.