I am trying to remember who a character named Denny was on the show. He is listed as being on several episodes, but I cannot remember him.

If I do believe right, Denny was a friend
of Theo's. Denny was in the episode when
Theo, Denny and another guy went to their
prom. Another episode he was in was when
Theo, Denny and some other guy threw a party and it got out of hand. I hope this helps!