Pierce helps Donnie when Donnie finds himself in a compromising situation and evidence stacks up against him. Meanwhile, Pierce's father assaults someone at an assisted-living facility.
Molly is so focused on directing a school recital that she doesn't realize a fellow teacher is hitting on her. Meanwhile, Vince convinces Mike to join him in an unusual money-making scheme.
A rogue Division agent named Ray kidnaps his ex-wife, Kate, and a Division team sets out to rescue her. Nikita is confused when Michael sends Owen on the mission with her instead of going himself. Meanwhile, Sean makes a decision about Alex.moreless
The only witness to a murder victim with human bite marks on his body insists it was a Zombie attack. Castle, Beckett and the rest of team must delve into New York's Zombie subculture to find the killer.moreless