How I Met Your Mother (8pm, CBS) - Unable to decide which of their friends would make the best godparents, Lily and Marshall put them all to a test.
Gossip Girl (9pm, CW) - Serena hosts a gala for a conservancy, while Blair encounters a past enemy as she gets ready to debut her fashion line.
Major Crimes (9pm, TNT) - Major Crimes teams with the FBI to apprehend a lethal sniper, and Raydor negotiates a deal that even Provenza can support.
Revolution (10pm, NBC) - The gang close in on Neville's group, but a discovery threatens to impede their efforts to rescue Danny. Also, Monroe (David Lyons, left) ups the value of Danny's life and Nora makes a connection with another rebel.
Castle (10pm, ABC) - Castle and Beckett head to the Hamptons for a romantic getaway, but their plans go awry when a man dies in Castle's pool and they assist the small-town police with the homicide investigation.
Hawaii Five-0 (10pm, CBS) - The death of a polo player who literally loses his head is investigated. Meanwhile, McGarrett's mother pays him an unexpected visit.
Intervention (10pm, A&E) - The story of a 25-year-old man with alcohol addiction who is expecting his first child.