Dr. Hyde gets a wise word in here and there in the book, but he isn't as fleshed out. In the series, he actually invites Pudge and Alaska to his home, where he talks about his past, during which he taught politics at Berkeley and was in love with a man who died of AIDS. (The Colonel briefly mentions that he had a late wife in the book.) Dr. Hyde is also more involved in the teens' lives in the series, even befriending the Colonel's mother and coming over for Christmas. We're not upset the Ron Cephas Jones (William from This Is Us) has more to say here, though!