UPDATE: Here's a full play-by-play recap of Episode 10, "Inmates." It's a doozy!

Original story:

AMC did a lot to prepare us for The Walking Dead Season 4’s midseason premiere, but what about Episode 10, “Inmates,” which will air tonight, aka Sunday, February 16?

Episode 9, “After,” closely followed the comic books, focusing on three characters in two storylines: Michonne (Danai Gurira) and, separately (until the end anyway), Rick Grimes (Andrew Lincoln) and Carl Grimes (Chandler Riggs).

This coming Sunday’s Episode 10 is meant to follow four storylines and at least 10 different characters. Here’s the official synopsis for “Inmates”: “In the quest for stability and safety, the group faces many obstacles.” (That could literally be the synopsis for every single episode of the show.)

A while back, Episode 10’s director, Tricia Brock, told the Columbia Daily Tribune this hour would feature four different storylines and "some of the oddest couplings of groups you've seen" on the show. "There was violence, difficulty in dealing with one another, terror,” she added. “It's a very intimate episode. We see how these very odd groups were thrown together and how they deal with that."

What groups? We’ll be looking for news on most of the remaining Team Prison peeps, so we're expecting to follow these mini groups:

1) Daryl Dixon (Norman Reedus) and Beth Greene (Emily Kinney), who left the prison together;

2) Bob Stookey (Larry Gilliard Jr.), Sasha (Sonequa Martin-Green) and Maggie Greene (Lauren Cohan), who were left behind by the bus;

3) Tyreese (Chad Coleman), Lizzie (Brighton Sharbino), Mika Samuels (Kyla Kenedy) and baby Judith (yes, she appears to be alive);

4) plus Glenn Rhee (Steven Yeun), Tara (Alanna Masterson), and the bus people.

And that's not counting the three new characters arriving. (See below.) You could also throw Carol Peletier (Melissa McBride) into the mix, since she’s returning at some point and spoilers suggest she’ll connect with Tyreese and the kids. Very soon.

Glenn is shown wearing prison riot gear in new photos from the second half of the season, so it looks like he returns to the prison, probably to look for Maggie. A new Spanish promo (watch it below) shows he does indeed run into Team Governor member Tara who was seen briefly in a previous promo, running out of the prison. Tara even asks him how he knows she (Maggie) isn't dead. Glenn admits he doesn't know. He also doesn't even know that Hershel is dead, and unless Tara spilled the beans, he probably doesn't know she was the first Team Governor person to agree to the plan to storm the prison.

That’s already a lot of people to follow, but the New York Post said three new characters from the comics will be arriving at the end of this episode. 

Sgt. Abraham Ford (Michael Cudlitz), Rosita Espinosa (Christian Serratos), and Dr. Eugene Porter (Josh McDermitt) will “enter into the series with a mission,” comic book writer/producer Robert Kirkman told The Hollywood Reporter, and they’ll “change the stories that we tell because of that. [...] These three characters more than any other characters are going to change the kind of stories that we tell and change the narrative drive of the series. There's going to be some big changes afoot mainly because of these characters.”

In the comics, the three were on their way to Washington, D.C. to get details on the origin of the zombie outbreak. If the TV show wants to change things up a bit, maybe they’ll be on their way to the “sanctuary” of the radio tease? That’s just a guess, based on showrunner Scott Gimple recently telling Entertainment Weekly that we’d get information on that radio tease “sooner rather than later.” Maybe it’s tied to the new characters. If not, it’s coming anyway, and that “sooner” may be right here on Episode 10.

Because Episode 10 is following so many stories, it will have a unique structure. Scott talked to Vulture about that in December. “In Episode 10 — I know it’s a structure that must have been done on television before but I can’t remember off the top of my head when it’s been done, and I’m sure someone will immediately point out to me that some of my favorite shows have done it — but Episode 10 has a really cool structure that I’m really excited to put in front of people.”

This whole episode sounds really cool, and still wonderfully mysterious. We can’t wait to see which characters get the most focus, and who comes across the newbies first.  

The Walking Dead Season 4 airs Sundays at 9 p.m. ET on AMC.

SourcesZap2itColumbia Daily TribuneNew York PostThe Hollywood ReporterVulture