When a series of backyard pool homicides are reported in California, the BAU team searches for an UnSub which has a puzzling past.
The team searches for the killer of a champion debater, who people believed had committed suicide after losing a debate.
Imprinted as a woman with a vision-impairment, Echo must infiltrate a cult to rescue a woman being held against her will.
McDowell and Sipowicz investigate Frank Colahan's parents to keep them from getting custody of the baby; someone attacks Haywood in her apartment building.
The grandparents of Connie's sister's baby vow to gain custody; Sipowicz investigates the murder of a man involved with a fraud ring.