About Criminal Minds Season 8, Episode 24 : The Replicator

The Replicator zeroes in on the BAU when the killer targets one of the team as the next victim. Also, the BAU is called in to investigate a string of deaths in Manhattan tied to apparent ecstasy overdoses, and Hotch discovers that his estranged brother, Sean, is caught in the middle Guest Stars: Mark Hamill, Nicholas Brendon, Brian Appel, Jayne Atkinson,