Merlin (8pm, NBC) - NBC didn't score with their futuristic retelling of David & Goliath, but maybe there's magic in "Merlin," a fantasy show about the pre-Camelot years of Arthur. Stars Anthony Head (left), who played Giles on "Buffy the Vampire Slayer." Back-to-back episodes at 8 and 9.
Impact (9pm, ABC) - Part one of a two-part sci-fi movie about the moon on a collision course with the earth. Starring James Cromwell and Steven Culp.
True Blood (9pm, HBO) - Sookie goes too far in helping Jessica adjust to her new life, and Jason makes an enemy at the Light of Day leadership conference.
In Plain Sight (10pm, USA) - Mary's sister Brandi is charged with drug trafficking and murder.
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