A serial killer has a dangerous obsession with an erotic bestseller and puts the BAU's profiling powers to the test. Kate faces trouble when her niece starts acting out.
A murder prompts the reopening of one of Tony's old investigations, leading Gibbs and DiNozzo to reverse roles to solve the case.
The team searches for a missing book containing top-secret information, which belonged to an antiques dealer who was murdered.
Government agents demand that Brennan and her team determine a cause of death for an unidentified and highly classified set of remains; Cam thinks Michelle is keeping a secret from her.
While Jane investigates the killing of a crime boss's son, Van Pelt has to face up to her past when she plays a dangerous game of cat-and-mouse in the woods.