Once Upon a Time | 8pm on ABC

David, Emma and Mr. Gold try to protect Mary Margaret from a vengeful Regina; a man and his son find their way into Storybrooke.

Nikita | 8pm on The CW

Amanda offers to release Alex in exchange for Ari; Alex befriends another prisoner and promises to help her escape.

The Bachelor | 8pm on ABC

Season Finale: The final two women meet Sean’s family; a confused Sean decides whether he wants to spend his life with Catherine or Lindsay.

Parks and Recreation | 8:30pm on NBC

Leslie and Ben have two hours to complete a years-long project. Meanwhile, Ron gets in trouble when his temper gets the best of him. Elsewhere, Leslie is literally left speechless when her planned address at a big media event is stolen. Ben starts his new job working at the Sweetums Charity Foundation, and Ann works […]

Arrow | 8pm on The CW

Oliver asks Detective McKenna on a date; a jewel thief targets someone close to Oliver; Thea’s purse is stolen.

30 Rock | 8pm on NBC

1 hr Series Finale: As Jack takes stock of his life, Liz struggles with her new role as a stay-at-home mother; Kenneth settles into his new job; the cast and crew come together for one last episode of TGS.

Happy Endings | 9:30pm on ABC

New eps at 9 & 9:30pm | When Penny learns that Pete wants to elope, Jane takes them to a wedding expo in hope of changing his mind; Dave and Alex deal with their unresolved issues.

White Collar | 10pm on USA

Peter and Neal search for the truth about Neal’s father’s crime; Neal goes undercover to take down a member of the Irish Mob.

Fringe | 9pm on Fox

2-hr Series Finale: The team implements a plan as Olivia begins a dangerous journey into the unknown; the team battles the Observers.

People’s Choice Awards | 9pm on CBS

At the Nokia Theater in Los Angeles, festivities honor fans’ favorites in movies, music and TV; Kaley Cuoco hosts; performances from Christina Aguilera, Jason Aldean and Alicia Keys.

Overboard | 7:45pm on Oxygen

A yachtsman’s wife falls overboard, forgets who she is and becomes an Oregon carpenter’s mate.

National Lampoon’s Christmas Vacation | 9pm on ABC Family

The Griswolds spend the holiday in a garish way, especially when a country cousin pulls up in an RV.

Gossip Girl | 9pm on The CW

Series Finale: Stars and executive producers say their goodbyes and revisit memorable moments; as the gang joins forces for one more soiree, Gossip Girl’s identity is finally revealed.

Frosty the Snowman | 8pm on CBS

The animated adaptation of Romeo Muller’s story introduces us to Frosty, a snowman that comes to life after finding a magical hat. The 1969 special is narrated by Jimmy Durante.

Elf | 8pm on ABC Family

Adopted as a baby by one of Santa’s elves, a man leaves the workshop to search for his family in New York.