It's Saturday and Brian has decided to spend it with Lisa B (Bre Blair). But everyone else needs him: Nic wants help with a car problem; Deena and Dave expect him to play Barney at their daughter's birthday party; and Adam wants to take a break from wedding planning and do guy stuff. Meanwhile, Marjorie keeps leaving Brian phone messages because she wants to talk about their relationship. Richard: Jon Hamm. Larissa: Mikaila Baumel.