What to Watch Monday: The Goodbye Gossip Girl, NBC's 1600 Penn Lobbies for Your Vote and More

New York, I Love You XOXOOn TV this Monday: The Upper East Side won’t be the same after Gossip Girl signs off for the last time, Hawaii Five-0 beams up a Star Trek fave, Julia Louis-Dreyfus and Brad Hall try to Picture Paris and a Sunnydale pair is reunited (kinda) on How I Met Your Mother. As a supplement to TVLine’s original features (linked within), here are 10 programs to keep on your radar.

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8 pm Gossip Girl (The CW) | Series finale: GG‘s two-hour final episode begins with the show’s stars and producers reminiscing about classic moments. Then it’s off to the Upper East Side one last time as the gang joins forces for a final soiree – might it be the one pictured here? – and Gossip Girl’s identity is finally revealed. (P.S.: House of Lies‘ Kristen Bell – aka the voice of GG – just might make an appearance. XOXO)

8 pm The Voice (NBC) | Season finale, Part 1: Terry McDermott, Cassadee Pope and Nicholas David perform in hopes of securing Season 3 victory.

8 pm Invasion of the Christmas Lights 2 (Discovery Fit & Health) | Marvel at the planning, intensity and (we assume) high electricity bills of people who turn their homes into blinking holiday beacons. (If you’re jonesing for more, Crazy Christmas Lights follows at 9 pm… then More Crazy Christmas Lights at 10 pm. Seriously.)

8:30 pm Ice Age: A Mammoth Christmas Special (Fox) | The characters from the animated film franchise are back for a special that finds Sid & Co. accidentally trashing Santa’s workshop on Christmas Eve.

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9 pm Cake Boss: Next Great Baker (TLC) | The construction of life-size cakes of comediennes Judy Gold and Carol Leifer leads to blood being spilled in the bakery. (For real!) You know what they say: It’s all fondant and games until someone gets hurt.

9 pm Picture Paris (HBO) | Brad Hall wrote and directed this quirky short film starring his real-life wife, Veep‘s Julia Louis-Dreyfus, as a suburban empty nester who finds that a life-changing trip to Paris with her husband doesn’t exactly match her expectations.

9 pm 2 Broke Girls (CBS) | Desperate to pay their overdue rent, Max and Caroline get mixed up with some sketchy customers willing to pay top dollar for their cupcakes.

9:30 pm 1600 Penn (NBC) | Sneak preview: This ensemble comedy about a First Family features Bill Pullman (Independence Day) as POTUS, while Josh Gad (The Book of Mormon) pulls focus as his goofball son summoned home after seven less-than-fruitful years in college. Jenna Elfman (Dharma & Greg) is the president’s trophy second wife, and Martha MacIsaac (Superbad) holds her own (and then some!) as a not-quite-perfect First Daughter. If you, like many, can’t get enough of Gad’s shtick, this will get your vote.

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10 pm Hawaii Five-0 (CBS) | Star Trek‘s George Takei takes a break from dreaming up droll Facebook posts to guest-star on the tropical procedural. (Fun fact: Takei appeared in the original H50 in 1975.) Oh, the plot? McGarrett and Catherine meet a boy whose father is missing and may be in trouble in the backwoods of Oahu.

10 pm Pawn Stars (History) | In back-to-back episodes, Chumlee attempts to plan the shop’s Christmas party. (Side note: Has the person who assigned Chum this task ever seen the show?)

Hit the comments with your must-see picks from tonight’s lineup!