TV THIS WEEK: Constantine premieres, Mockingbird on S.H.I.E.L.D., and more

Friday night, we finally get the premiere of Constantine, rounding out our fall comic-book show premieres and giving us a spookier side of superhero TV, but that's not the only big premiere this week. Both Grimm and The 100 return in the coming days, plus Ghost Hunters celebrates 200 episodes, Mockingbird debuts on Agents of S.H.I.E.L.D.American Horror Story: Freak Show begins a two-parter, and more.

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

Highlights of the Week

Marvel's Agents of S.H.I.E.L.D. (ABC) Tuesday, 9 p.m. - "A Hen in the Wolf House" 

We've already checked in with S.H.I.E.L.D. to see how ratings are looking so far this season, but we're including the show in the Highlights section again this week because this is an episode that could have major implications for the future of the series and the small-screen faction of the Marvel Cinematic Universe. This is the episode that will introduce Bobbi Morse, aka Mockingbird (Adrianne Palicki) to the show. Agents of S.H.I.E.L.D. has seen its fair share of super-energy already, thanks to a host of (some would say increasingly interesting) supervillains and cameos by the likes of Nick Fury, Peggy Carter and Lady Sif, but Mockingbird could have a much bigger impact. She's one of the few Marvel superheroes so far (along with Deathlok) to be introduced on the show, and though we don't yet know what her role in the season will be exactly, we do know that there's a chance for her to make a big splash and up the ante on the comic-book-ness of the comic-book-inspired drama. This week, the team encounters Morse when she's working as security chief for HYDRA, and Skye's hidden father pushes Raina harder in her efforts to reunite him with his daughter. Check out a preview below.

The 100 (The CW) Wednesday, 9 p.m. - "The 48"

Season premiere! - Last season, The CW premiered three new sci-fi dramas -- The Tomorrow PeopleStar-Crossed and The 100 -- and by the time the dust of 2013-2014 TV had settled, The 100 was the only one still standing. Its post-apocalyptic, survival-at-all-costs vibe gave it a little bit of Hunger Games flair, and audiences responded. Now it enters its second season in an interesting position: It's the only one of The CW's current genre shows that's not superhero-based or paranormal in nature. It's the only sci-fi show on the network (though The Flash certainly has a lot of sci-fi flavor), and that makes it stand out. We'll have to wait and see if standing out will make the show a welcome break from the rest of the network's lineup in the eyes of viewers, or an aberration that they grow tired of. This week, an old enemy returns, and Jaha makes a heroic decision. Check out a preview below.

Grimm (NBC) Friday, 9 p.m. - "Thanks for the Memories"

Season premiere! - For many TV viewers, hearing that your favorite show is airing on Friday can be a major bummer, because it's often been said that Friday night is where shows go to die. There are plenty of shows that disprove that theory, though, and Grimm is definitely one of them. The supernatural drama got its start on Friday, and after a bit of shuffling around to Mondays and Tuesdays during its second season, it wound up back there for good in season three, where it not only survived but thrived. Last season Grimm finished with a total viewer average of 7.97 million, besting its previous high by more than 1 million viewers, and the season premiere was watched by a total (factoring in Live+7) of nearly 10 million people. Now we get to see if season four can do even better. This week, Nick copes with losing his powers, Adalind is desperate to find her child, Captain Renard fights for his life, a new group of Wesen hits Portland, and more. Check out a preview below. 

Constantine (NBC) Friday, 10 p.m. - "Non Est Asylum"

Series premiere! - At last, the moment has arrived. The third and final comic-book-inspired premiere of the fall is here with Constantine, and for many comics fans this show might just be the most anticipated of the bunch. Gotham offers us a dark city before it got its dark knight, The Flash offers a bright look at the Fastest Man Alive, and, if the trailers are any indication, Constantine is set to give us a suitably dark and spooky glimpse into the world of everyone's favorite smartass demon hunter. Matt Ryan has the look down, the trailers have been very evocative, there's a sense of a larger universe beyond John Constantine, and reactions to the pilot at San Diego Comic-Con were strong. Now Constantine gets its first test, premiering with what's likely to be a strong lead-in from fellow supernatural drama Grimm, just in time for Halloween. Will it be a hit, or will it wither away on Friday nights? We'll find out. This week, Constantine jumps back into the demon-hunting game to save an old friend's daughter, and maybe his own soul in the process. Check out a preview below.

The Walking Dead (AMC) Sunday, 9 p.m. - "Four Walls and a Roof" 

Now that we've been through a couple of truly brutal episodes of The Walking Dead's fifth season, it's time to see how the ratings look. As expected, the season premiere numbers were big, but even if you were expecting this show to break another record, you might not have been expecting just how high the ratings went. The season premiere on Oct. 12 drew a massive 17.3 million viewers and scored an 8.7 rating in the key 18-49 demographic. That was good enough to best not just every scripted show on TV that night, but also the always-powerful Sunday Night Football. The Live+3 numbers for the premiere were equally impressive, shattering previous records and bringing the show up to a total of 22.3 million viewers. When the Live+7 numbers come in, that figure will spike even higher, but you get the idea here: The Walking Dead is just as unstoppable as ever, and continues its rise as a ubiquitous part of pop culture. At the time of this writing, we don't yet have numbers for episode two, but we can expect them to also be impressive. What we do have from episode two, though, is the introduction of a storyline many Walking Dead comics fans have long been waiting for, and a sense of a larger trajectory for at least the first part of season five. I'm not going to spoil what happened last night for people who might not have caught up just yet, but know that it's a big moment for readers of the comics, and it's got big implications for upcoming episodes. It'll be interesting how all of this plays out, who survives, and how high the ratings can get when midseason finale time comes around. This week, barely out of Terminus, Rick and company face a new threat. Check out a preview below.

Now, let's check out the rest of this week's offerings...

Monday, October 20

Gotham (FOX) 8 p.m. - "Viper"

Gordon and Bullock are on the case when a new euphoric but lethal drug hits the streets. Elsewhere, Oswald Cobblepot integrates himself into Maroni's inner circle and Fish Mooney continues to set her targets on Falcone.

The Originals (The CW) 8 p.m. - "Every Mother's Son"

A dinner invitation from Esther makes Klaus and Elijah suspicious of their mother's intentions, but they hope a new witch named Lenore can help them outsmart her. Meanwhile, Esther shares a secret about Klaus' childhood and reveals what she has in store for her children.

Star Wars Rebels (Disney XD) 9 p.m. - "Fighter Flight"

Ezra and Zeb steal an Imperial vehicle while on a simple errand.

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

An undead Weeping Lady in Sleepy Hollow is actually a woman from Ichabod's past who's bent on destruction. Meanwhile, Katrina and Ichabod discover disturbing news about each other, and Abbie is surprised by flirtatious encounters.

Scorpion (CBS) 9 p.m. - "Plutonium is Forever"

Walter enlists the help of a former troubled team member when a Los Angeles nuclear reactor is on the verge of a cataclysmic meltdown.

Tuesday, October 21

The Flash (The CW) 8 p.m. - "Things You Can't Outrun"

Barry and the team go after the Mist, who possesses toxic gas powers, and they reflect on the night Caitlin's fiancé died. Meanwhile, Henry gets a long-awaited visit from Joe; and Iris and Eddie continue to keep their romance a secret from Joe.

Marvel's Agents of S.H.I.E.L.D. (ABC) 9 p.m. - "A Hen in the Wolf House" 

Read more in our Highlights section above.

Supernatural (The CW) 9 p.m. - "Soul Survivor"

Sam tries to release Dean from the Mark of Cain. Meanwhile, Crowley seeks the help of an unlikely ally after encountering problems due to Dean's behavior.

Face Off (Syfy) 9 p.m. - "Creature Carnage"

The four semifinalists are given the task of creating giant city-crushing monsters.

Forever (ABC) 10 p.m. - "The Frustrating Thing About Psychopaths"

Copycat murders resembling famous cases from history are investigated by Henry and Jo.

Person of Interest (CBS) 10 p.m. - "Prophets"

A talented political pollster's number comes up, and when his normally accurate predictions start going wrong at the same time, Finch suspects a connection. Elsewhere, Capt. Moreno gives Reese an order that sidelines his work.

Town of the Living Dead (Syfy) 10 p.m. - "A Zombie Baby Is Born" and "Don't Mess with the Money-Maker"

Bryan experiences increased anxiety as he prepares for his first kissing scene; at the same time, the crew attempt to film the birth of a zombie baby, and Gary must ask his sworn enemy for a favor.

Wednesday, October 22

Arrow (The CW) 8 p.m. - "Corto Maltese"

Oliver tries to track down Thea in Corto Maltese as Diggle searches for a missing field operative. Meanwhile, Felicity adapts to her new job.

The 100 (The CW) 9 p.m. - "The 48"

Read more in the Highlights section above.

Ghost Hunters (Syfy) 9 p.m. - "200th Episode: Grant Is Back"

Two-hour special! - TAPS return to the Trans-Allegheny Lunatic Asylum in Weston, W.Va., for their 200th episode, which finds the team reunited with Grant, Dustin and Joe. Included: Efforts are made to reach former patients who suffered tragic lives in the hospital. 

American Horror Story: Freak Show (FX) 10 p.m. - "Edward Mordrake, Part 1"

Part 1 of 2. Jimmy is captivated by a woman claiming to be a fortune teller. Meanwhile, Ethel receives surprising news.

Thursday, October 23

Teen Titans Go! (TOON) 6 p.m. - "Serious Business" 

The Titans learn what a bathroom is really for.

Steven Universe (TOON) 6:45 p.m. - "Island Adventure"

Steven, Lars and Sadie visit a beach to mend their friendship.

The Vampire Diaries (The CW) 8 p.m. - "Black Hole Sun"

Damon relives a horrible day in order to find his way home. Elsewhere, Alaric tries to help Jeremy cope with loss; Stefan teaches Elena about creating a new identity; and Tripp shares a dark secret with Matt.

Friday, October 24

Legend of Korra ( - "The Calling" 

In search of Korra, the Airbender kids hit the road.

Haven (Syfy) 7 p.m. - "Nowhere Man"

A paranormal trouble strikes just as the guys bring the Mara threat under control.

Grimm (NBC) 9 p.m. - "Thanks for the Memories"

Read more in our Highlights section above.

Constantine (NBC) 10 p.m. - "Non Est Asylum" 

Read more in our Highlights section above.

Z Nation (Syfy) 10 p.m. - "Welcome to the FU Bar"

The survivors struggle to recover from a shocking death, and in Kansas they happen upon a gun show that makes the zombie apocalypse look calm.

Saturday, October 25

Doctor Who (BBC America) 9 p.m. - "In the Forest of the Night"

Huge forests grow up overnight around the world and begin to overwhelm the Earth.

Sunday, October 26

Once Upon a Time (ABC) 8 p.m. - "Breaking Glass"

All of Storybrooke's in danger as a new evil arrives.

Resurrection (ABC) 9 p.m. - "Will"

Margaret proves she's a force to be reckoned with when, to her displeasure, Barbara makes strides in mending her relationship with Fred and Maggie. Elsewhere, Bellamy's situation grows more precarious as he struggles to keep his secret from Maggie, all the while taking desperate measures to deal with a strange virus that is spreading among the returned.

The Walking Dead (AMC) 9 p.m. - "Four Walls and a Roof" 

Read more in our Highlights section above.

More from around the web