Laura Coover

After Mike encourages him mum to get a job, she becomes a lunch lady at Molly's school, which doesn't sit well with Molly.

Molly decides to go after a big career move and asks Mike to accompany her to a staff party; Mike hates Halloween and doesn't like the idea of mingling with other teachers, but Molly convinces him to go.

When Molly receives some disappointing news at work, she enters a bad mood that threatens to destroy Christmas.

Deputy Director Ochoa tasks the team with a covert operation focused on dismantling a terrorist group. Callen worries about what the assignment means for the future of the team.

Castle is asked to consult on a case when evidence in a young woman's murder implicates Dr. Kelly Neiman (Annie Wersching) -- Castle and Beckett's nemesis.

Upton brings SVU detective Petrovic back into the fold to help with the investigation of a tender-age kidnapping.