: The team makes a major breakthrough when they realize the killer is actually a woman, Sarah Danlin . Her motive is rooted in the trauma of her father's death; she targets men she believes are "sinners" or "lustful".
: Spencer Reid is shown grappling with his addiction to Dilaudid following his kidnapping by Tobias Hankel. His old friend Ethan appears in this episode, acting as a foil as they discuss their different paths after the FBI academy. [S2E18] Jones
: Reid identifies that the unsub is following the "JTR paradigm," even down to specific rituals like removing a victim's ear. : The team makes a major breakthrough when
: Garcia finds a link between the victims through companies involved in "Leaking Underground Storage Tanks" (LUST). [S2E18] Jones