Janie Haddad Tompkins

Claire has overdone it in Halloweens past and the neighbors definitely don't share her enthusiasm, so this year she's being forced to tone it down and keep it "kid-friendly," and Phil has an idea to hold an open house on Halloween night. Meanwhile, Mitch and Cam host a costume party while contending with Lily wondering who her real mom is, and Gloria's pregnancy hormones are on overdrive, making her even more hotheaded than usual.

Dr Spencer Reid suspects that a young man who has reached out to him for help may be a serial killer when he expresses his fantasies of killing prostitutes.

Jake asks Holt for help keeping a case involving a serial killer under the radar. A former adversary makes demands of Amy and Rosa, and Terry develops a new obsession.

A minor nose-bleed sends a panic-stricken Monk scurrying frantically to the nearest hospital, where he falls foul of a murderous medical whose outstanding surgical skills are matched only by his sheer homicidal ruthlessness.