Caroline asks Max to help her break into her former townhouse to retrieve her much-needed night guard.

While investigating the mysterious shooting death of a young woman, Castle and Beckett face a cop's worst nightmare when they discover that the gun used in the killing is Det. Ryan's old service weapon - the one that was stolen by the serial killer, 3XK. Now with the clock ticking, the team must work to solve the murder, track down 3XK and retrieve Ryan's gun before the killer strikes again.

Executive Producer Sean Hayes joins the show's cast and crew as they pull back the curtain on the secret world of fairytales in this behind-the-scenes sneak peek of Grimm.

Zoe enters a gumbo contest in yet another attempt to prove she can fit in as a Bluebell resident; Lavon has a crush on Zoe and Brick's new receptionist, and the news sours Lemon; and Zoe and Brick must look past their differences to save someone's life.

Dave welcomes actor Tracy Morgan, sportscasters Mike Greenberg and Mike Golic and musical guest Mates of State.

A three-part Halloween special in which terrifying tales are told. Creepy Doll: The guys discover an old doll that wants revenge on Pops. Death Metal Crash Pit: A pit is haunted by a 1980s death-metal band. In the House: On Halloween, Mordecai dresses up as a father with five "kids", to receive more candy, while Rigby goes as a robber and scares away people.

Episode info coming soon ..