Howard and Bernadette are reluctant to leave Halley in day care. Bert introduces the gang to his new girlfriend.
- Cold Turkeys Are Everywhere: Bernadette becomes depressed after taking Halley to the zoo on her last day of maternity leave because all the animals she sees take care of their young for longer than she is.
- Gold Digger: Bert's girlfriend Rebecca is considered this by the group, since they got together after Bert mentions winning the MacArthur Grant on his online dating profile. It ends up being deconstructed, as the group pressures Bert to dump her for this trope and he does so, only to regret it because he was happier with her, however superficial it may have seemed. The group ends up wondering how much different it really is to be with someone for their money versus their looks or intelligence.