TV THIS WEEK: Under the Dome returns, Twilight Zone marathon, and more!

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Jan 25, 2016, 4:21 PM EST (Updated)

It's a big week for genre TV, with two new premieres and a couple of big Fourth of July weekend marathons.

First, we get the second-season return of Under the Dome, which took network television by storm last summer, and this time around the Dome is proving it's got a few more tricks to throw at us. Plus, Lifetime's Witches of East End returns on Sunday, and Heroes of Cosplay ends its season with a dramatic finale. We've also got a couple of special events to celebrate Independence Day this week, as Syfy rolls out its annual Twilight Zone Fourth of July marathon and AMC devotes the entire weekend to re-running all four seasons of The Walking Dead.

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

Highlights of the Week

Under the Dome (CBS) Monday, 10 p.m. - "Heads Will Roll"

Season-two premiere! - After becoming a ratings smash for CBS last summer, the Stephen King-based series returns for another season of mayhem with the Dome still looming large over Chester's Mill. It'll be interesting to see how the series continues to evolve beyond the confines of King's novel as the story expands, and it'll also be interesting to see what the ratings look like the second time around. The show definitely has a devoted viewership going into season two, but we'll have to see if the show gets a boost from people who caught up on season one over the last several months. The season-one finale drew more than 12 million viewers last September. Will the season-two premiere top it? The series certainly brought out the big guns to kick things off. Tonight's episode is scripted by King himself, and it features a magnetized Dome and a mysterious stranger who might know where the Dome came from in the first place. Check out a preview below.

Harry Potter: The Making of Diagon Alley (NBC) Monday, 8 p.m.

Behind-the-scenes special! - We know you just can't get enough Harry Potter, and so does Universal Studios Orlando. The park's about to open a massive new Potter attraction that takes visitors inside the Wizard World's favorite marketplace, Diagon Alley, and to celebrate its opening, NBC's bringing us a one-hour special documenting the making of Diagon Alley, from its design and construction to new footage filmed by members of the original Potter film cast. The attraction's not open yet, but this might just be the next best thing. Check out a sneak peek below.

The Twilight Zone (Syfy) Friday, 8 a.m. - 8 p.m.

Fourth of July marathon! - There are many ways to celebrate your independence on Friday, but cracking open a beer (or two, or ... well, you know) and watching 24 straight episodes of one of the greatest genre series ever is definitely one of the better ones. Kicking off in the morning with "Five Characters in Search of an Exit," and concluding in the evening with "Nightmare at 20,000 Feet," Syfy's annual marathon will feature some of the greatest episodes of Rod Serling's iconic anthology, including "The Eye of the Beholder," "Living Doll," "Time Enough at Last," "To Serve Man" and many more. Spend your day with Serling, then head out for fireworks and hot dogs at night. 

Talking Dead (AMC) Sunday, 9 p.m. - "Season 5 Preview Special"

After a weekend-long marathon of the first four seasons of The Walking Dead, AMC will cap off its zombified Independence Day celebration with a special look at the upcoming fifth season of the smash hit series, as host Chris Hardwick sits down with showrunner Scott M. Gimple and Archer star/nerd hero Aisha Tyler to talk about what's in store for Rick and the gang. We might not get much in the way of spoilers for season five, but if you've been itching to know what happens next, this is likely the closest you'll get for a few more months (or at least until the inevitable Comic-Con trailer hits), so be sure to check it out.

Witches of East End (Lifetime) Sunday, 9 p.m. - "A Moveable Beast"

Season two premiere! - Lifetime's witchy drama didn't hit the smash ratings levels of the network's past hits, like Army Wives, but it did develop a sizeable and devoted (the show never fell too far from its viewership highs) following in its first season, ensuring a second. Now, we'll see if season two can get a boost from word of mouth and viewers who decided to catch up. In the season-two premiere, the Beauchamp family struggles to remember what happened when the portal opened in Fairhaven at the end of season one. Check out a preview below.


Monday, June 30

Beauty and the Beast (CW) 9 p.m. - "Operation Fake Date"

As Cat tries to save Vincent, Gabe tries to win back Cat.

Teen Wolf (MTV) 10 p.m. - "117"

Scott teams up with an unlikely ally to put an end to Kate's plan.

Tuesday, July 1

The Wil Wheaton Project (Syfy) 9 p.m. - "Wil Wheaton and the Half-Blood Project"

This week, Wil talks Michael Bay and Transformers: Age of Extinction.

Heroes of Cosplay (Syfy) 10 p.m. - "Wizard World New Orleans"

Season finale! - The cosplayers face their toughest challenge yet as they must prepare a skit at Wizard World New Orleans.

Wednesday, July 2

Wilfred (FXX) 10 p.m. - "Loyalty" 

Ryan and Wilfred are taking sides in Kristen's ongoing custody battle.

Thursday, July 3

Defiance (Syfy) 8 p.m. - "The Cord and the Ax"

Irisa tries to hide her blackouts from Nolan. Stahma's leadership proves beneficial to the Tarr family.

Dominion (Syfy) 9 p.m. - "Broken Places"

Alex still hopes to leave his "Chosen One" duties, but a battle against Gabriel forces him to fight side by side with Michael.

Teen Titans Go! (TOON) 6 p.m. - "Money Grandma"

In an effort to be re-elected as Team Leader, Robin starts a smear campaign against the other Titans, leading Raven to bring a great leader from the past forward in time to teach Robin a lesson.

Adventure Time (TOON) 7 p.m. - "Something Big"

Princess Bubblegum must rally the Candy Kingdom to defend against a major attack.

Friday, July 4

The Walking Dead (AMC) 8 a.m. - "Dead White & Blue Weekend"

Full series marathon! - Whether you're new to The Walking Dead, you need to catch up, or you're just in the mood for a re-watch, AMC has you covered this weekend. Beginning Friday morning they're airing all four seasons of the hit zombie series in order, right up until the Talking Dead season five preview special at 9 p.m. Sunday. 

Saturday, July 5

Saturday's quiet. Watch some Walking Dead, sleep off that July 4 hangover, and enjoy a leftover hot dog or two.

Sunday, July 6

True Blood (HBO) 9 p.m. - "Fire in the Hole"

Pam tries to motivate Eric, while Sookie devises a dangerous plan.

The Leftovers (HBO) 10 p.m. - "Penguin One, Us Zero"

Meg tries to let go of the past. Kevin visits a therapist.

Falling Skies (TNT) 10 p.m. - "Exodus"

Maggie confronts Lexi. Tom and the 2nd Mass try to escape the Espheni ghetto.

The Last Ship (TNT) 9 p.m. - "Dead Reckoning"

Chandler faces enemy demands that he hand over Rachel and her research.

Salem (WGN) 10 p.m. - "Ashes, Ashes"

Aiden's trial begins, and Salem's fate is tested.

Halt and Catch Fire (AMC) 10 p.m. - "Landfall"

Cameron is at odds with Gordon after a breakthrough. Joe faces another difficult decision.


What are you going to be watching this week? Let us know in the comments!