Trying to remember a particular episode

I watched this show as a child when it aired originally, and I still remember bits and pieces of different episodes. The one I remember involved Lucas coming home from college for a weekend and bringing his black girlfriend with him. I've looked through the list of episode names, and none stands out as being this one. I also remember others - when they had a young, pregnant houseguest named Debbie; when Jenny thought she was pregnant; etc. I wish the episode list had plot summaries!