When Cliff's associate Dr. Dan Morgan stops by to discuss the planning of an annual fund-raiser, Dan sees the love in the Huxtable family. This causes him to break down crying. It turns out Dan has a daughter with some serious problems. He tells Cliff that he understand where he went wrong. He then asks Cliff how he and his wife avoided the pitfalls that come with having teenagers. This later leads Cliff and Clair to have a serious discussion with their kids.