The BAU team must delve into Morgan's past to prove his innocence when he is arrested on a charge of murder in Chicago.
Police investigate when the frozen corpse of a missing woman is discovered at a construction site; Beckett must confront some difficult memories.
After catching Melinda in several lies, Sam has second thoughts about their relationship.
Sipowicz and Sorenson investigate the robbery of an elderly couple, but become annoyed with a retired cop who tries to intervene.