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, Sherri Shepherd, Jaleel White 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 celebrity 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 (right) 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.