TV THIS WEEK: The Librarians premieres, an Arrow/Flash crossover, and more!

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Dec 1, 2014, 5:46 PM EST (Updated)

Usually, this is the time of year when we're saying goodbye to shows, watching midseason finales and then impatiently waiting for our favorite series to return next year. Well, there's certainly plenty of that going around, but this week TNT is giving us a premiere to go with those finales, with the debut of The Librarians. Plus an Arrow/The Flash crossover, Sleepy Hollow's midseason finale, and much more.

And, as an extra treat, since it's December, we're also adding a few holiday specials to the listings, and we'll keep peppering them in each week in the lead-up to Dec. 25. It's not an exhaustive list of every time you can watch Christmas programming this month (basically, turn on your TV almost any time and you'll find something), but it should come in handy for whenever you're looking to add some Christmas cheer to your TV time.

Check out the week in TV below. What's on your watchlist?

Highlights of the Week

Sleepy Hollow (FOX) Monday, 9 p.m. - "The Akeda"

Midseason finale! - Last year, Sleepy Hollow was one of the season's breakout hits: a fun fantasy series that wasn't afraid to pour on the genre fun, even if that meant getting a little goofy. It was the kind of show that instantly endeared itself to quite a few viewers. This season, though, the story's a little different. Gotham is now the Golden Child in FOX's lineup, and while Sleepy Hollow still holds a sizeable chunk of its season-one audience, the show has slipped. Now, it definitely hasn't slipped enough to be canceled. In fact, it's still one of its network's stronger shows, but there's definitely a bit of a sophomore slump happening as we head into the midseason finale. Will the show start a rebound by going out of 2014 with a bang? Find out tonight, when loyalties are put to the test in a battle between good and evil. Check out a preview below.

Toy Story That Time Forgot (ABC) Tuesday, 8 p.m. 

Holiday special! - Last year, Woody, Buzz and the rest of the Toy Story gang returned with a Halloween special, the amusing Toy Story of Terror. Now, after the announcement of their fourth feature film, the toys are back for a Christmas adventure in which they must fend off a gang of delusional action figures during a post-holiday playdate. There's been a lot of discussion lately about whether Toy Story should keep going, about whether the franchise can ever return to the heights of Toy Story 3's very emotionally satisfying conclusion. Toy Story of Terror definitely held on to the old charm of the characters, though, and there's reason to believe we'll have another fulfilling toy adventure in this year's special. Plus, it's always nice to see a new bit of Christmas programming that packs this level of talent. Check out a preview below.

The Flash (CW) Tuesday, 8 p.m. and Arrow (CW) Wednesday, 8 p.m. - "Flash vs. Arrow" and "The Brave and the Bold"

Crossover event! - Over the past two years, Arrow has built itself from gritty vigilante drama into a kind of comic-book launchpad, a place where DC Comics characters, tropes and stories can come out to play in the sandbox that is Starling City. Last year, the show launched The Flash, and with its own debut this fall Barry Allen's series cemented itself as one of the hottest new shows on broadcast TV. The CW has two major superhero hits on its hands, so it's no wonder that a crossover event is on the way. This week we'll see Oliver Queen and Barry Allen teaming up to fight not one but two supervillains, including the just-introduced Captain Boomerang (Nick Tarabay). We don't yet know exactly how far the two shows will take this crossover, or whether it'll lead to future team-ups (we're thinking yet), but if you're a viewer who's been following the development of this little DC microverse for the past couple of years, this is kind of the icing on the cake. After all, what's more comic-book than a crossover? Check out a preview below.

Z Nation (Syfy) Friday, 10 p.m. - "Doctor of the Dead"

Season finale! - Back when Z Nation premiered, I wondered aloud if there was really room for the show in a cable landscape that's so thoroughly dominated by The Walking Dead, and I wasn't the only one asking that question. When the show you're most easily compared to is the biggest show on TV, you're bound to get doubt like that right out of the gate. For Z Nation to survive, it was going to have to carve out its own zombie storytelling niche. Well, we're coming to the end of the show's first season now, and though its ratings can't touch The Walking DeadZ Nation has definitely proven it can do its own thing with zombies. Over the course of 12 episodes the show's given us everything from the glowing, irradiated undead to a literal tsunami of zombies. It's fast, it's fun, and it never takes itself too seriously, and that's earned a loyal following of more than 1 million Live+Same Day viewers per episode, a very respectable number for a cable series that airs late Friday night. Now, season one comes to an end with the survivors heading to Fort Collins, Colo. After that, we just wait for season two.

The Librarians (TNT) Sunday, 8 p.m. - "And the Crown of King Arthur" & "And the Sword in the Stone"

Series premiere! - After three fun made-for-TV adventure movies starring Noah Wyle as a librarian on the trail of magical artifacts, The Librarian franchise is finally getting to go long-form with The Librarians, a new series following a team of such artifact hunters as they find lost treasures and fight evil. Wyle returns as Librarian Flynn Carsen, but this series will also star a quartet of new Librarians, played by Rebecca Romijn (X-Men), Christian Kane (Angel), Lindy Booth (Dawn of the Dead) and John Kim (Neighbours). Trailers for the series are definitely preserving the comedy-adventure vibe of the films, and the cast is packed with genre favorites, so we could be looking at a brand-new TV addiction. Check out a preview below.

Monday, December 1

Santa Claus Is Comin' to Town (ABC Family) 5 p.m.

Fred Astaire and Mickey Rooney are among those who lend their voices to this holiday tale, which explains the legend of Santa Claus and how he began delivering toys to children on Christmas Eve. As a young man, he tries to deliver toys to the kids of Sombertown, but is met with opposition by the bitter Burgermeister Meisterburger, a mayor who hates toys and deems them “illegal, immoral, unlawful.” Other voices include Keenan Wynn, Joan Gardner and Paul Frees.

Elf (ABC Family) 8 p.m.

A human (Will Ferrell) who has been raised by elves leaves the North Pole to search for his gruff birth father (James Caan) in New York City. Winning holiday fantasy. Mary Steenburgen, Bob Newhart, Edward Asner, Zooey Deschanel. Jon Favreau directed.

Sleepy Hollow (FOX) 9 p.m. - "The Akeda"

Read more in our Highlights section above.

Tuesday, December 2

Toy Story That Time Forgot (ABC) 8 p.m.

Read more in our Highlights section above.

The Flash (CW) 8 p.m. - "Flash vs. Arrow"

Read more in our Highlights section above.

Agents of S.H.I.E.L.D. (ABC) 9 p.m. - "Ye Who Enter Here"

The team beat Hydra in the race to locate the ancient city, but a sacrifice must be made in order to expose the city's secrets. Meanwhile, May and Skye hurry to reach Raina before Whitehall finds her.

Supernatural (CW) 9 p.m. - "Hibbing 911"

Jody Mills reluctantly attends a mandatory sheriff's retreat and is partnered with an overeager sheriff who wants to bond. Even worse, a body with just strings of meat and skin hanging off the bones is discovered. Jody calls Sam and Dean for help.

Forever (ABC) 10 p.m. - "The Man in the Killer Suit"

A British aristocrat is found dead in Central Park.

Wednesday, December 3

Arrow (CW) 8 p.m. - "The Brave and the Bold"

Read more in our Highlights section above.

The 100 (CW) 9 p.m. - "Fog of War"

Tensions run high between Clarke and Finn, while Raven discovers that Mount Weather is interfering with their communication systems. Meanwhile, Jasper and Monty discover the truth about what's going on at Mount Weather, and Octavia comes face to face with her worst nightmare.

The Polar Express (ABC Family) 9 p.m.

One fateful Christmas Eve, a disillusioned little boy, barely old enough to doubt the existence of Santa Claus, has the adventure of a lifetime aboard a magic train bound for the North Pole.

American Horror Story: Freak Show (FX) 10 p.m. - "Blood Bath"

Recent disappearances around camp raise Ethel’s suspicion of Elsa. Gloria makes a last-ditch effort to contain Dandy’s bloodlust.

The Almighty Johnsons (Syfy) 11 p.m. - "Everything Starts With Gaia"

A giant turns up at the flat looking for Gaia, and it transpires that he has been sent to kill her.

Thursday, December 4

The Year Without a Santa Claus (ABC Family) 6 p.m.

Shirley Booth, Mickey Rooney and Dick Shawn lend their voices to this animated fantasy about a saddened Santa. The score includes such holiday favorites as "Blue Christmas," along with six tunes composed by Maury Laws and Jules Bass.

Peter Pan Live! (NBC) 8 p.m.

Live special! - Mermaids, fairies and a vile villain named Captain Hook all intertwine in this adaptation of the Broadway musical centering on a playful boy who never wants to grow old. Allison Williams, Christopher Walken and Minnie Driver star.

The Vampire Diaries (CW) 8 p.m. - "I Alone"

Damon gets into trouble when he carries out a plan that requires Alaric's unwilling participation; Elena is surprised by Jeremy's reaction when she shares hopeful news about Bonnie; Matt takes matters into his own hands when Enzo's actions cross the line; Kai continues to be a dangerous threat.

The Almighty Johnsons (Syfy) 11 p.m. - "Magical Fluffy Bunny World"

As Gaia tries to accept the surprising news that she is Frigg, Eggther threatens to kill Zeb unless she is delivered to him.

Friday, December 5

Legend of Korra (Nick.com) "3 Beifong Generations"

It's family reunion time on Korra.

Haven (Syfy) 7 p.m. - "Chosen"

Midseason finale! - The revelation of Mara's endgame spurs Audrey and Nathan to pursue a plan to stop her once and for all.

Dr. Seuss' How The Grinch Stole Christmas (ABC Family) 8 p.m.

Lavish live-action version of the classic tale, starring Jim Carrey -- in Oscar-winning makeup -- as the coldhearted creature trying to thwart Whoville's Yuletide celebration.

Grimm (NBC) 9 p.m. - "The Grimm Who Stole Christmas"

A bizarre string of home invasions lead to an even stranger Wesen phenomenon; Monroe plans a special Christmas surprise for Rosalee; and Truble comes to a life-changing realization that impacts everyone.

Constantine (NBC) 10 p.m. - "Blessed Are the Damned"

Zed's bizarre vision of snakes leads her and John to a small town where a preacher has mysteriously gained the ability to perform miracles.

Z Nation (Syfy) 10 p.m. - "Doctor of the Dead"

Read more in our Highlights section above.

Saturday, December 6

Atlantis (BBC America) 9 p.m. - "The Marriage of Two Minds"

As plans progress for the royal wedding, Jason fears for Ariadne's safety when she travels to Telemon's homeland of Aegina.

Arthur Christmas (ABC Family) 9 p.m.

This animated family comedy follows Santa's mischievous son Arthur (voice of James McAvoy) as he races against time to ensure that the children of the world receive their presents by Christmas morning.

Sunday, December 7

Once Upon a Time (ABC) 8 p.m. - "Shattered Sight"

The Snow Queen's spell has everyone in Storybrooke at each other's throats.

The Librarians (TNT) 8 p.m. - "And the Crown of King Arthur" & "And the Sword in the Stone"

Read more in our Highlights section above.

Resurrection (ABC) 9 p.m. - "Aftermath"

No plot synopsis for the midseason finale of this drama, but if you're a fan be sure to tune in. 

(Episode synopses via TV Guide)