The BAU responds quickly after a serial killer releases a new strain of a deadly anthrax virus in Annapolis that threatens the public and puts a member of the team at risk.
A serious complication threatens the fetuses of two of Naomi's former patients. Violet is asked to testify against her attacker, and Charlotte tries to join the Oceanside Wellness Group.
Earl helps Randy track down the mysterious girl who broke his heart 20 years ago, but Randy's shocked when he finds out who she is.
After a family vote, Burt is forced to suffer the cruellest cut of all: a vasectomy. Trouble also brews when Virginia and Sabrina discover each other's secrets.