HIGHLIGHTS

HIGHLIGHTS

"Dollhouse" (Fox at 8) returns from a November-sweeps-induced hiatus with a two-hour episode. While Echo rushes to stop a senator from exposing the Dollhouse secrets, Adelle and Topher meet a Dollhouse programmer (guest star Summer Glau) who is mysteriously connected to Echo's past.

The Mode Magazine staff (and guest star Shakira!) travel to the Bahamas on "Ugly Betty" (ABC at 9). Meanwhile, as Betty and Amanda are tangled in a love triangle with their boss, Matt, Wilhelmina discovers shocking news about her former lover.

Even though the death of a high school boy was ruled a skateboarding accident, Melinda is not so sure after his ghost tells her a shady cop had something to do with it on "Ghost Whisperer" (CBS at 8).

Christmas has officially arrived in Washington, as the "National Christmas Tree Lighting" (WETA at 9) is held at the White House.

After eight seasons and quite a few Emmy Awards for Tony Shalhoub, Adrian Monk signs off for good; on the series finale of "Monk" (USA at 9), the obsessive-compulsive detective searches one last time for the person responsible for his beloved wife's death.

Allison uses her visions to try to stop a bioterror attack on "Medium" (CBS at 9) after samples of deadly disease viruses disappear.

Not only does Chris Brown have a concert in Washington on Friday night, but an interview with the R&B star airs on "20/20" (ABC at 10), in which he discusses his former relationship with pop singer Rihanna.

The mtvU Woodie Awards (MTV at 10) honor the best music of the year, chosen by college students, and includes performances by Death Cab for Cutie and the Dead Weather. Presenters include two groups up for best new artist at the 2010 Grammy Awards: MGMT and Silversun Pickups.

Peter can't decide whether his new pal Neal is lying when he's accused of being involved in a jewelry heist on "White Collar" (USA at 10).

Actor Kelsey Grammer is a guest on "The Jay Leno Show" (NBC at 10), and singer Taylor Swift answers 10 questions.

"The Politics Program With Mark Plotkin" (NewsChannel 8 at 11) hosts Sen. Jim Webb (D-Va.), who discusses Afghanistan, and developer R. Donahue Peebles, who talks about a possible run for District mayor.

Actress Rachel McAdams and singer Diane Birch visit "The Tonight Show With Conan O'Brien" (NBC at 11:35).

Comedian Don Rickles stops by "Jimmy Kimmel Live!" (ABC at 12:05) along with actress Anika Noni Rose and Band of Skulls.

-- Emily Yahr