Author Richard Castle joins NYC Detective Kate Beckett to help solve the case of a serial killer, who is reenacting murders from Castle’s novels. Castle becomes very intrigued with the murders and continues to shadow Beckett, much to her chagrin.

Marshall and Lily are less than thrilled when they hear that Ted’s college girlfriend (Laura Prepon) has moved to New York.

When Sylar comes face-to-face with his long lost father, the reunion proves to be what he least expected. Elsewhere, after receiving a tip from « Rebel », Claire must decide if she will help her sworn enemy, Eric Doyle, evade capture. Meanwhile, as « The Hunter » plans to uncover the Petrelli family’s secrets and take control of Nathan’s operation, Matt finds himself in the spotlight and on the verge of leveling Capitol Hill.

Kyle risks losing Cassidy’s trust when he begins a deception aimed at discovering Latnok’s true purpose, and Jessi, devastated by their discovery, has a hard time putting aside her emotions. Elsewhere, Josh plans a perfect farewell for Andy.

The siege on the White House reaches an explosive end after Jack and Bill work together to try and save President Taylor.

Meanwhile, Jonas Hodges makes moves to cover his own tracks, starting with Ryan Burnett.

Walt and Jesse are reminded of Tuco’s volatile nature, and try to figure a way out of their business partnership. Hank attempts to mend fences between the estranged Marie and Skyler.

Echo becomes an expert safe-cracker, and an invaluable piece of art is stolen from her on the engagement, forcing Sierra to take on a familiar persona. Agent Ballard gives Lubov an ultimatum, and Adelle confides shocking information to Topher.

The rebel Cylons and the Colonial humans react to Hera’s kidnapping while the physical condition of the Galactica continues to deteriorate.

Earl works on a list item that has to do with Chaz Dalton, his childhood hero.
Meanwhile, Darnell tries to help Joy make friends using the internet.

Before pardoning a notorious gang leader, who has been nominated for a Nobel Prize for his anti-gang work while in prison, the Governor wants Cal and Ria to assess whether he has really changed. Meanwhile, Gillian and Eli investigate after an autopsy reveals a firefighter who supposedly died in a fire, was already dead.