Castle tries to protect Beckett as she pursues the man who shot her; the 12th precinct is forever changed as feelings and secrets are revealed.
Tired that his father has once again found a way to pit Gob and him against each other, Michael decides to teach his father a lesson.
Sawyer discovers how far his captors will go to thwart his and Kate's escape plans; Jack must scrub up to save an Other's life; Desmond's behavior perplexes the survivors when he starts constructing an unknown device.
SAMCRO makes a run to set up a new business venture while Gemma makes a new ally in Charming.