TV THIS WEEK: Midseason finales for The Flash, S.H.I.E.L.D., and more!

With just a few weeks left in 2014, it's midseason finale time.

We've already said goodbye for the year to a few of the shows we cover here, but this week the midseason finales are really kicking into gear. In the next seven days we'll see the 2014 departures of The Flash, Arrow, Constantine, Grimm, Once Upon a Time and more. Plus, we've added a couple more Christmas specials to the listing to help keep you in the holiday spirit. 

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

Highlights of the Week

The Flash (The CW) Tuesday, 8 p.m. - "The Man In the Yellow Suit" 

Midseason finale! - At last, the big moment The Flash has been building to since the series premiere is here ... in some form, anyway. So far, things have gone about as well as they possibly could for the new CW series centered on DC Comics' Fastest Man Alive. The show is one of the most watched on its network; it's drawn praise from casual viewers, critics and die-hard comics superfans (including legendary The Flash writer Mark Waid); and its bright, often optimistic take on superheroism stands in contrast to much of what we've seen from DC Comics in recent years. The Flash is a clear hit, and last week's two-night crossover event with fellow CW hit Arrow only bolstered its status as a must-see genre show. Now the show's first fall finale has arrived, and Barry Allen is set for a confrontation with Reverse-Flash, the yellow-suited man who killed his mother all those years ago. The show's done a very good job thus far of introducing single-episode supervillains for Barry to battle while also building to this showdown, and now we have to see if the showdown pays off. Check out a preview below.

Marvel's Agents of S.H.I.E.L.D. (ABC) Tuesday, 9 p.m. - "What They Become" 

Midseason finale! - Though its ratings have taken a drop since last season (though not enough to doom it), Agents of S.H.I.E.L.D. has never fared better from a creative standpoint. The die-hard fans who stuck around for a second year of stories are generally responding quite well to what they're seeing, reviews for season two are significantly better than those from season one, and best of all, the show seems to really have a plan this time out. Even the series' showrunners have admitted that last year's big HYDRA reveal put the show in the awkward position of having to wait for the right time to reveal it, but this season Agents of S.H.I.E.L.D. feels like it's on firm ground in its own right. Even if the scale is smaller, it feels like the show has really developed its own personality and direction and carved out its own important space in the Marvel Cinematic Universe. Now, with what promises to be a revealing midseason finale approaching, we have to see if the series will keep that up. This week, the forces of Coulson and Whitehall collide, and Skye finds a surprising secret about her past. Check out a preview below.

Arrow (The CW) Wednesday, 8 p.m. - "The Climb" 

Midseason finale! - We've spent a lot of time this TV season talking about the success of The Flash, but that doesn't mean we've forgotten about its big brother over on Wednesday nights. Now in its third season, Arrow isn't pulling in quite as many Live+Same Day viewers as it did when it started, but it's no less of a hit for its network. It remains one of the CW's top shows and has won over more comic-book fans in the last two seasons with its devotion to pursuing very comics-inspired storylines. This season the show up its DC Comics ante yet again by bringing no less a supervillain than Ra's al Ghul into the fold, setting the stage for some very ambitious battles ahead. And on the ratings side, last week's crossover episode with The Flash set a record for the series. All that adds up to a must-watch midseason finale, in which Ra's al Ghul hands down an ultimatum to Oliver Queen that could put all of Starling City at risk. Check out a preview below.

Constantine (NBC) Friday, 10 p.m. - "The Saint of Last Resorts"

Midseason finale! - This is a bitter farewell for Constantine fans. Sure, it's midseason finale time, which means the show will likely do its best to keep us all itching to come back in 2015, but this broadcast also marks the eighth of the show's 13 ordered episodes. There are only five left, and as you've probably heard by now, NBC has opted not to order additional episodes. As you also may have heard, that doesn't mean the show won't get renewed for a second season, but things look a little bleak on the Constantine front at the moment. It's a joyful time of year, though, so instead of pondering the show's cancellation, let's look on the bright side. The show is still pulling in more than 3 million Live+Same Day viewers per episode, and an enthusiastic "Save Constantine" campaign is all over the web. That viewer number might sound low, but let's think about another Friday night NBC series that managed to survive with even fewer Live+Same Day viewers per episode: Hannibal. By keeping its production costs down and maintaining a rabid online fanbase, Hannibal earned not just a second, but a third season on the network, and it could survive even longer than that. If Constantine can convince network executives that it has similar potential, there's a good shot at a second season. Of course, Hannibal has also been a critical darling in ways that Constantine hasn't thus far, but hey, it's the season of hope. This week, John and Chas move close to the source of Rising Darkness, and Zed is haunted by her past. Check out a preview below.

Once Upon a Time (ABC) Sunday, 8 p.m. - "Heroes and Villains"

Midseason finale! - We've talked before about the renewed enthusiasm that came to Once Upon a Time when the show introduced characters from Disney's animated hit Frozen to kick off a lengthy season-four storyline. Now that storyline's coming to an end, and the midseason finale has a two-pronged purpose: Give satisfying closure to that story, and introduce a new arc that will continue to hold viewers' interest. To do that, Once Upon a Time's bringing in not one, not two, but three evil queens. Kristin Bauer van Straten is back as Maleficent, and she'll be joined by Victoria Smurfit as Cruella de Vil and Merrin Dungey as Ursula. That's a lot of evil for Storybrooke to take on. Now we see how the show sets up the confrontation. Check out a preview below.

Monday, December 8

The Originals (The CW) 8 p.m. - "The Map of Moments"

Midseason finale! - Rebekah notices an unusual change in Elijah's behavior and meets Klaus and Haley at a safe house, where they are reunited with baby Hope. Meanwhile, Kaleb sheds light on a spell he created in 1914; Cami learns Esther's plan will put her life in danger; and Esther makes an unlikely alliance that could prove to be dangerous for Klaus.

Scorpion (CBS) 9 p.m. - "Revenge"

Sylvester is seriously injured when he accidentally triggers an explosive device during an investigation; and Team Scorpion search for who is responsible.

Tuesday, December 9

Rudolph the Red-Nosed Reindeer (CBS) 8 p.m. 

Burl Ives narrates this animated musical, first telecast in 1964. The Johnny Marks score includes the title tune, "Holly Jolly Christmas" and "We're a Couple of Misfits."

The Flash (The CW) 8 p.m. - "The Man in the Yellow Suit" 

Read more in our Highlights section above.

Marvel's Agents of S.H.I.E.L.D. (ABC) 9 p.m. - "What They Become" 

Read more in our Highlights section above. 

Supernatural (The CW) 9 p.m. - "The Things We Left Behind"

Midseason finale! - Castiel finds Jimmy's daughter Claire in a group home, and she convinces him to break her out. After she runs away from him, Castiel calls Sam and Dean to help find her before she gets into trouble. Meanwhile, Crowley faces his biggest challenge.

Forever (ABC) 10 p.m. - "Skinny Dipper"

A cab driver is murdered with an antique sword.

Wednesday, December 10

Arrow (The CW) 8 p.m. - "The Climb" 

Read more in our Highlights section above.

The 100 (The CW) 9 p.m. - "Long Into an Abyss"

A dangerous secret is revealed by Bellamy and Octavia.

American Horror Story: Freak Show (FX) 10 p.m. - "Tupperware Party Massacre"

Maggie spurs Dandy to action. Meanwhile, Stanley and Elsa track down the Twins.

The Almighty Johnsons (Syfy) 11 p.m. - "The House of Jerome"

As Axl deals with dueling prophecies, marriage might be in the cards for Anders.

Thursday, December 11

The Vampire Diaries (The CW) 8 p.m. - "Christmas Through Your Eyes" 

Midseason finale! - Bonnie tries to replicate her favorite traditions, while reminiscing about happier times with her friends; Sheriff Forbes brings holiday cheer to Caroline at Whitmore College; Alaric turns to Damon and Elena for help when Jo goes missing; Tyler approaches Liv and Luke with a risky plan; Jeremy helps Matt carry out a plan to take down Enzo; and Stefan is forced to break some devastating news to Caroline.

Scrooged (ABC Family) 9 p.m. 

A greedy TV executive learns the true meaning of Christmas in this updating of "A Christmas Carol."

The Almighty Johnsons (Syfy) 11 p.m. - "You Call This The Real World?"

Axl and Gaia's escape from the real world lands them in a strange B&B as Mike discovers he's being watched. 

Friday, December 12

Legend of Korra ( - "Kuvira's Gambit"

Kuvira's planning both her wedding and her attack on Republic City. 

Grimm (NBC) 9 p.m. - "Chupacabra"

Midseason finale! - Nick and Hank find themselves investigating the gruesome trail left behind by a blood-sucking creature known as the chupacabra, which was brought to Portland by an unsuspecting traveler; at the same time, Monroe and Rosalee get ready to leave on their long-overdue honeymoon; Viktor and Adalind plan a trip of their own; and Wu prepares to confront Nick about what he has been seeing.

Constantine (NBC) 10 p.m. - "The Saint of Last Resorts"

Read more in our Highlights section above.

Saturday, December 13

Atlantis (BBC America) 8 p.m. - "The Day of the Dead"

The heroes find themselves scattered across the necropolis, and discover they are not alone in this dead space. They are in fact surrounded by an army of the undead. With their backs against the wall, they must find an unlikely ally in Medea, an alliance that troubles Jason.

Sunday, December 14

Once Upon a Time (ABC) 8 p.m. - "Heroes and Villains" 

Read more in our Highlights section above.

The Librarians (TNT) 8 p.m. - "And the Horns of a Dilemma"

The Librarians' first solo mission hits a snag when Baird loses the others in a mysterious Labyrinth that magically exists below the skyscraper of a modern corporation.

(Episode snyopses via TV Guide)

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