How I Met Your Mother (8pm, CBS) - The Season 8 finale, set just before Robin and Barney's wedding, has Ted taking Lily to see the house he's been fixing up, and Robin and Barney having their night of relaxation interrupted by an obnoxious couple.
90210 (8pm, CW) - The series ends with cast and producers reflecting on the show's memorable moments. Then, the gang (right) come together after a traumatic event strengthens their relationships.
2 Broke Girls (9pm, CBS) - Season 2 ends with Max and Caroline offering to deep-clean a previously hidden part of the diner and discovering something that could revive their cupcake business.
Castle (10pm, ABC) - In the Season 5 finale, Beckett interviews with a federal agency, prompting her to reexamine her personal and professional lives. Meanwhile, the team investigate the death of a young woman who was found floating inside of a water tank in a flop house.
Bates Motel (10pm, A&E) - Dylan and Bradley connect, and Emma goes on a trip.
Rectify (10pm, Sundance) - Daniel begins to lose his grip on reality as he struggles to adjust to life on the outside. Meanwhile, Ted Jr. starts to question Daniel's innocence.
Revolution (10pm, NBC) - Romance heats up between Miles and Nora, and Charlie and Jason. Also, the militia launches drone strikes, Monroe faces an assassination attempt, and President Foster considers surrender.

Before there were celebrity designers (and celebrities who wanted to be designers), there was Betsey Johnson. The punk-rock, crinoline petticoat wearing, handstand performing kookster makes clothes that make you smile -- joyous and girly.
Once Upon a Time (8pm, ABC) - In the second season finale, the inhabitants of Storybrooke brace themselves for annihilation when Greg and Tamara detonate the trigger Regina had placed within the curse. Meanwhile, back in Neverland of the past, Hook discovers his connection to a young Bae (Dylan Schmid, left) after he rescues him from the sea and soon realizes that the Lost Boys are in hot pursuit of the child.
Smash (8pm, NBC) - A tribute night is held to honor Tom and Julia's work, which pleases Tom, but Julia is preoccupied with "Hit List." Elsewhere, Ivy is hesitant to perform a risque number, and the cast of "Hit List" deal with a devastating betrayal.
Vegas (9pm, CBS) - In the Season 1 (and let's be realistic, probably the series) finale, a vengeful Sheriff Lamb (Dennis Quaid) joins forces with Savino (Michael Chiklis) to bring down Porter Gainsley, who was behind the murder of Lamb's wife and the attempt on Katherine's wife.
Glee (9pm, Fox) - In the Season 4 finale, the glee club performs at Regionals with newfound determination to advance in the competition. Meanwhile, Brittany comes back from MIT with a new attitude, Blaine shops for an engagement ring and Ryder learns more about his "catfish." Patty Duke and Meredith Baxter guest star.