Guy Nardulli

Marshall, Lily, Robin, and Kevin celebrate Valentine's Day with a weekend in Vermont; Barney meets his match.

Morgan, Prentiss, Reid and JJ attempt to stop a stalker from reaching the object of his obsession. Meanwhile, Hotch and Rossi try to figure out whether a woman who killed her husband can use battered-woman syndrome as a defence.

Morgan's visit with the survivor of an unusual stabbing spree in upstate New York leads to more questions about the case.

New York City is plunged into darkness, and dangerous events are set into motion. Emily wants Aiden to flee before he is forced to take the blame.

The team attempt to treat a police officer with a bullet wound in his head who is displaying some strange symptoms. Dr Foreman soon finds himself in a similar situation.

As mobster Nicky Augustine (guest star Mike O’Malley) targets Winona (Natalie Zea) in order to convince Raylan (Timothy Olyphant) to turn over Drew Thompson, Boyd (Walton Goggins) and Ava (Joelle Carter) devise a clever ruse to dispose of a corpse that connects them to a murder.