Gossip Girl (8pm, CW) - A busy Blair asks Serena to impersonate her at a meeting. Elsewhere, Ivy and Lola join forces to help Chuck exact revenge.

2 Broke Girls (8pm, CBS) - In a one-hour Season 1 finale, Max and Caroline attend a fashion gala at a museum where Martha Stewart is a guest, and they attempt to get the domestic maven to taste their cupcakes.

The Voice (8pm, NBC) - The remaining four vocalists compete in the final performances.

Top Gear (8:30pm, BBC America) - Ryan Reynolds appears in an episode in which Jeremy and Richard plan a film's climactic car chase.

House (9pm, Fox) - A Princeton-Plainsboro pathologist doesn't trust any of his colleagues to diagnose and treat him except for House, who is missing. So House's team must make the skeptical patient believe that House is actually directing his case.

Castle (10pm, ABC) - In the Season 4 finale, a military veteran's homicide leads Beckett to go after the man who shot her, and a concerned Castle wants to protect her from the danger she's facing.

Lost Girl (10pm, Syfy) - Kenzi drunkenly summons a witch to punish Dyson for how he treated Bo.

Dancing with the Stars (8pm, ABC) - The 14th season begins with 12 couples dancing either the fox-trot or the cha-cha. Gladys Knight, Melissa Gilbert, and Martina Navratilova are among the dancers, but here is the full list of this season's competitors. Click below to see a photo of the full cast.

Pretty Little Liars (8pm, ABC Family) - The secret identity of "A" is revealed in tonight's season finale.

How I Met Your Mother (8pm, CBS) - The gang try to break up Barney and Quinn after learning that the couple plan to move in together.

2 Broke Girls (8:30pm, CBS) - Max and Caroline enjoy a spring getaway when they take care of a dog at a couple's ritzy apartment.

Alcatraz (9pm, Fox) - Musically inclined serial killer Webb Porter (relation to Cole?) resurfaces and causes trouble.

Hawaii Five-0 (10pm, CBS) - McGarrett's sister is arrested for allegedly smuggling $20 million in conflict diamonds. To clear her name, Steve enlists the help of a former diamond smuggler to set up a sting operation. Ed Asner reprises the role of smuggler August March, which he created on the original series, and footage from that 1975 episode is shown. In tonight's show, March is now out of prison after serving a 30-year sentence.

Smash (10pm, NBC) - The Marilyn musical is performed in front of a group of potential investors, and Ivy's confidence is weakened by her mom, a Broadway veteran. Also, repercussions await Julia and Michael.

Lost Girl (10pm, Syfy) - Bo probes a sex-related murder case with her new friend, Saskia.

How I Met Your Mother (8pm, CBS) - Robin moves to the suburbs with Lily and Marshall and Ted wonders what to do with her empty room. Meanwhile, Barney decides to court a stripper.

*House (8pm, Fox) - House's mother (Diane Baker) shows up with news about a new man in her life.

Being Human (9pm, Syfy) - Josh reaches out to Nora and Sally finds out who has been haunting her. Meanwhile, Aiden is targeted by werewolf twins.

*Alcatraz (9pm, Fox) - An innocent man from Alcatraz resurfaces to commit crimes.

Hawaii Five-0 (10pm, CBS) - A famous talk-radio DJ is murdered and the investigation brings Five-0 in contact with a retired NYPD bomb expert (at James Caan, right with son Scott Caan) with ties to the victim.

Smash (10pm, NBC) - Derek hosts a party for a popular young star, reminding Karen she must propel her career. Meanwhile, Eileen tests a crafty way to secure funds and Tom dates someone new.

Lost Girl (10pm, Syfy) - Kenzi inadvertently brings home a vicious Fae spider that can make people psychotic after she performs a spiritual cleansing of a house.  

Fashion Police (10pm, E!) -  A review of last night's 2012 Academy Awards show fashions.

*Rescheduling of Daytona 500 will likely preempt "House" and "Alcatraz" tonight, but it's not 100% certain yet.

The Voice (8pm, NBC) - 'The Voice' follows their post-Super Bowl debut with a two-hour episode containing more blind auditions. Coaches Cee Lo Green, Christina Aguilera, Adam Levine and Blake Shelton at left.

House (8pm, Fox) - Following a violent incident involving a patient, House and the team are placed under review by the neurology chief.

The Bachelor (8pm, ABC) - The remaining women (both North Carolina women are still in the mix, but something tells me that changes tonight!) visit Panama, and hopefully, Emily from Chapel Hill can stop talking about Courtney for five seconds.

Alcatraz (9pm, Fox) - We've only seen prisoners up to now, but tonight an old guard resurfaces and encounters an old acquaintance.

Hart of Dixie (9pm, CW) - Tonight's Valentine's dance episode features a performance by Raleigh native Tift Merritt.

Smash (10pm, NBC) - This much-hyped debut of NBC's (much better!) answer to "Glee" follows a group of professional adult people staging a Broadway show. In tonight's debut, a writing duo come up with the idea to base a musical on Marilyn Monroe, and an experienced chorus girl competes against a promising newcomer. It has a great cast, which includes Debra Messing, Angelica Huston and Katharine McPhee. Here's my full review.

Lost Girl (10pm, Syfy) - Bo protects a human woman after a fury tries to hire Bo to kill her husband's mistress.

Betty White's 90th Birthday: A Tribute to America's Golden Girl (8pm, NBC) - Stars salute Betty White as she celebrates her 90th birthday. The tribute, which was taped on January 9, includes music performances and remarks from White, who shares memories and offers her thanks. Some of the guests offering their regards are Mary Tyler Moore, Carol Burnett, Carl Reiner, Amy Poehler, Ed Asner, and Gavin McLeod.

How I Met Your Mother (8pm, CBS) - Lily and Marshall move to the suburbs and the rest of the gang deal with their departure by hitting a strip club.

Alcatraz (8pm, Fox) - The 2-hour opener of a new drama in which prisoners who mysteriously vanished decades ago from Alcatraz prison reappear in the present. Tonight, a task force comes together when a sniper starts targeting young victims. It's good! WATCH IT! My longer review.

The Bachelor (8pm, ABC) - Ben returns to his other hometown, San Francisco, with the 16 remaining girls and goes skiing with 11 of them. The big event tonight is the cocktail party crasher -- Ben's former girlfriend who wants to join the competition. The other girls are not amused. There's a lot of crying.

Being Human (9pm, Syfy) - In the Season 2 premiere, a vampire power vacuum weighs on Aidan, Sally's powers grow stronger, and Josh and Nora try to live "normal" lives.

Betty White's Off Their Rockers (9:30pm, NBC) - A sneak peek at the hidden-camera comedy series featuring Betty White and a group of seniors pulling pranks on unsuspecting folks. It's "Punk'd" for the blue-hair set.

Lost Girl (10pm, Syfy) - The debut of a new supernatural drama about a seemingly ordinary girl who suddenly finds out  she's a succubus.