Episode Title: “Under the Gun”
Episode Description: When a coded document hidden by a murdered bail bondsman gets Castle’s imagination running wild, Beckett must steer the case back to the violent felons who populated their victim’s world – only to discover that maybe Castle’s crazy theories aren’t so crazy after all. Complicating matters is the surprise arrival of Beckett’s ex-partner (now a bounty hunter). As the two reunite over a history that Castle has no part of, Castle is forced to watch the relationship take a turn towards the romantic. Watch Episode »

Episode Title: “He’s Dead, She’s Dead”
Episode Description: When a famous psychic is murdered, Beckett and Castle search for her killer while also carrying on a spirited debate on the existence of extrasensory abilities. Evidence mounts on both sides, especially when a letter arrives from the victim, penned the day she was killed and predicting her own death — or was it written by a clever killer, hoping to throw off the investigation? Watch Episode »

Episode Title: “A Deadly Affair”
Episode Description: Beckett hasn’t heard from Castle since he left for the Hamptons months ago to finish writing his second Nikki Heat novel, “Naked Heat”. The most Beckett, Ryan and Esposito have seen of Castle is a bookstore standee of him advertising an upcoming book signing. So when Beckett and her team burst into a shadowy apartment on the trail of a murderer, the last thing they expect to see is the real-life Castle standing over a dead woman’s body holding a gun! As Castle protests his innocence, Beckett has no choice but to arrest him on suspicion of murder. Watch Episode »

Episode Title: “A Deadly Game”
Episode Description: Nothing is as it seems when Castle and Beckett investigate what appears to be the assassination of an intelligence operative. Meanwhile, Beckett’s romance with Demming threatens her relationship with Castle, forcing them to confront their feelings for each other. Watch Episode »

Episode Title: “Overkill”
Episode Description: A robbery-homicide prompts Beckett to invite Demming to assist on a case, giving Castle a ringside seat to their budding romance. When it becomes clear that the two men have very different ideas about how to proceed, the investigation becomes an unspoken competition for Beckett’s attention, one in which each man races to solve the case, as Beckett referees between her two admirers. Watch Episode »

Episode Title: “Food to Die For”
Episode Description: A dynamic restaurateur, who finds herself mixed up in the murder investigation of a former contestant on a Top Chef-like series, shares an attraction to Castle. The restaurateur is a high school friend of Det. Beckett’s. Beckett’s relationship with Det. Demming continues to grow. Watch Episode »