The Behavioral Analysis Unit (BAU) travels to Boston to investigate the return of a notorious serial killer, , who had stopped killing 10 years prior. The killer had previously made a "deal" with the lead detective on the case to stop his spree if the investigation was dropped. When that detective dies, The Reaper begins killing again to reclaim his "power". Key Character: The Reaper (George Foyet)
is the 18th episode of the fourth season of the police procedural drama Criminal Minds . It is a pivotal episode in the series as it introduces George Foyet , also known as The Reaper , who becomes one of the most significant and recurring antagonists in the show's history. Plot Overview [S4E18] Omnivore
: Fans often cite this episode as the beginning of one of the show's best story arcs. It sets up a long-standing personal rivalry between Foyet and Unit Chief Aaron Hotchner . The Behavioral Analysis Unit (BAU) travels to Boston
Detailed recaps and fan analysis are also available via the . S4E18 - “Omnivore” - Unsubs: A Criminal Minds Podcast Key Character: The Reaper (George Foyet) is the