Martin follows Jake’s numbers to help reconnect a French woman with her twin sister and biological mother, and then attempts to locate the person responsible for their alienation. Meanwhile, a superstitious Italian woman becomes anxious after her astronaut husband loses contact with Earth.
Phil buys a car without consulting Claire. Jay is on a mission to get to his high-school reunion with Gloria and Manny. Lily loses her favorite toy on a train.
Sue finds a kindred spirit in her awkward school guidance counselor, Jane Marsh (Whoopi Goldberg), who inspires her to reinvent herself. Meanwhile, Frankie is ecstatic when she and Mike buy a much needed new bed but is gobsmacked when her stubborn husband insists on assembling it himself; and Brick attempts to call the President to outlaw the Presidential Fitness Challenge, which would force him to accomplish some strenuous physical exercises at school.
When Castle and Beckett investigate the murder of a man with human bite marks on his body, Castle’s wild theories start flying. But none are as wild as what their only witness insists happened – a Zombie attack. As the evidence pointing towards an undead assailant piles up, the team plunges into New York’s Zombie subculture to find the killer and bring him in — dead, undead or alive.
Marshall panics when a baby shower indicates that the birth is close at hand and accidentally takes a road trip with Barney. Ted hallucinates seeing Robin while trying to get over her and decides to patch up their differences. Barney tries to talk Quinn out of being a stripper.