Regina Saldivar

The BAU team pursues an amateur surgeon who amputates limbs from his victims; Reid's calls to a mystery woman create intrigue.

Lt. Casey, who is at the center of an undercover operation to bring down a trafficking ring run out of Nesbitt's strip club, finds himself in very dangerous territory. Meanwhile, as a result of the high turnover rate on squad, Severide gets a rude awakening when Capt. Dallas Patterson is brought in.

Luc's mother (Sonia Braga) stirs up trouble when she meddles in Nora's romantic affairs.