: John Vincent Bell, an ex-convict who abducts father-daughter pairs and forces the fathers to fight homeless men to the death in order to save their daughters.

: The BAU joins forces with a separate, "Red Cell" team of operatives—led by Sam Cooper—who operate outside the traditional FBI bureaucracy.

The Criminal Minds Season 5, Episode 18, titled "," originally aired on April 7, 2010. This episode is significant as it serves as the backdoor pilot for the spin-off series Criminal Minds: Suspect Behavior . Episode Overview Case Location : San Francisco, California.