When the gang recreates a high-school prom night on the roof of the guys' apartment building, Sheldon feels pressure to participate in all the typical romantic traditions.
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 is caught in the middle.
The Replicator zeroes in on the BAU when the killer targets one of the team as the next victim.
