Gossip Girl (8pm, CW) - In the two-hour series finale, the gang (at right) joins forces at a party and the identity of Gossip Girl is revealed. The finale also includes memorable scenes from past seasons, plus interviews with the cast and producers.
How I Met Your Mother (8pm, CBS) - Robin takes steps to have Patrice fired from WWN, while Marshall puts a jinx on Barney.
Extreme Makeover: Home Edition (8pm, ABC) - A couple with more than 30 foster children are given a larger home.
Christmas with the Mormon Tabernacle Choir (9pm, UNC-TV) - Jane Seymour and baritone Nathan Gunn join the Mormon Tabernacle Choir and Orchestra at Temple Square for a Christmas celebration.
1600 Penn (9:30pm, NBC) - A special sneak peek at a new NBC sitcom following fictional U.S. presidential and his family. In this first episode, the president's son is caught in a public mishap and escorted back to the White House, where he's kept under close surveillance. Later, the president discusses a trade agreement with visit South American leaders. Bill Pullman plays the president and Jenna Elfman is the first lady. Adrienne has a review.
Hawaii Five-0 (10pm, CBS) - McGarrett and Catherine try to help a boy whose father disappeared and may have gotten into some deadly trouble in the backwoods of Oahu.
Brooke Cain isn't always proud of the number of hours she logs in front of the TV, but her loss of brain cells can be your gain. From reality shows to sitcoms to the more serious stuff, Brooke keeps her DVR smoking so that she can help keep you in the know. Brooke also tweets for Happiness is a Warm TV (you can follow