Criminal Minds: Season 6, Episode 1

6 - 1: The Longest Night

After Morgan and Detective Matthew Spicer are ambushed, the BAU continues their search for the "Prince of Darkness" to retrieve Spicer's daughter, Ellie, and stop his killing spree once and for all. When they get into a stand-off with the UnSub, JJ is forced to negotiate for Ellie's freedom.