When Monk’s truck driving father rolls into town at Christmastime, Monk joins him on the road, where they stumble across a very peculiar mystery.

When an undercover cop in Baltimore involved in a mob investigation goes missing, the BAU believes a serial killer rather than organized crime has something to do with his disappearance….

Derek and Addison’s relationship is rocked to the core when a former friend comes to Seattle Grace and his presence promises to shake things up for a few members of…