After determining that victims were transported deep into woods, the Behavioral Analysis Unit discovers that the perpetrators have a new sport.
When Kate comes down with appendicitis on Christmas Eve, the Pearsons take her to the hospital, where they run into Dr. K, who they realize needs their support; Kevin celebrates Hanukkah with Sloane's family.
Simone leads the investigation when a murderer claims someone close to the squad; Russell questions Simone's approach to the case; Donna quits her job.
With Nic's due date steadily approaching, she and Conrad plan a relaxing day off; Devon stays by Rose's side as she starts her clinical trial and things take a turn for the worse; Kit is under pressure to bring Chastain out of debt.
A small-time band promoter is found dead; mail-order brides fall victim to violence; Haywood worries a released felon is after her.