Laura Coover

When clues in a murder implicate Castle and Beckett's nemesis, Dr. Kelly Nieman (guest star Annie Wersching), Castle is called in to consult on the case. But as the team delves deeper into the investigation, they uncover connections to notorious serial killer Jerry Tyson.

When Molly gets disappointing news at work, she is thrown into a funk that threatens to ruin Christmas.

Mike encourages his mother to get a job, not realizing how it will impact Molly's life.

Mike's spooked when Molly's boss invites them to a party on Halloween, a holiday he dreads.

As Agent Carter closes in on Howard Stark's stolen technology, Peggy's secret mission could unravel when the SSR arrests Jarvis, and a secret is revealed.