Emily Davenport

When a web celebrity is murdered, Castle and Beckett explore the flashy world of internet fame. But when the killer posts pictures from the crime scene on a photo-sharing site, they realize they are up against a social media sociopath who may strike again.

With Derek away, Meredith spends time with Amelia and finds out her true feelings about her time in Seattle. Bailey deals with the ramifications of her actions and Callie receives devastating news. Meanwhile, the residents panic after hearing that one of them will be fired.

With the final clue in hand, Jane attempts to gather the remaining Red John suspects – Gale Bertram, Bret Stiles, Reede Smith, Ray Haffner and Tom McAllister – in one place in hopes of finally revealing his identity.

While investigating the homicide of an overzealous journalism student, Jane is not happy when a former colleague (recurring guest star AMAURY NOLASCO – Prison Break) returns to the Boston Police Department as the new lieutenant of the drug unit. But the murder Jane is investigating soon forces her to deal with him — and the event in the past that wrecked their relationship. Meanwhile, an alarming tip from Cailin (recurring guest star EMILEE WALLACE) causes Maura to investigate Hope (recurring guest star SHARON LAWRENCE).

As Masters (Michael Sheen) is haunted by memories of his childhood traumas, Haas (Nicholas D’Agosto) looks to advance his career by dating Scully’s (Beau Bridges) teenage daughter.