Season 1: Episode 7: One More Time
After babysitting for a friend, Clair becomes obsessed with the idea of having another child. The kids are terrified at the implications this would have on them, and Cliff isn't too thrilled either. Clair's mother visits and suggests that she simply wait a few years for grandchildren. Theo beats Cliff at basketball for the first time. This prompts Cliff to warn Clair that they are too old to keep up with another child. He wants them to be able to spend time together and travel after their retirement. Clair tells him that she had already come to her senses.