Credit: Gene Page/AMC Photo: Hershel Greene Tends to a Sick Patient in The Walking Dead Season 4, Episode 5: “Internment”

It’s war! OK, maybe not yet, but it sounds like the prison has to gear up for battle on The Walking Dead Season 4 Episode 5, “Internment” (which airs Sunday, November 10 at 9 p.m. ET on AMC). We’re just not sure how many enemies they’ll be fighting.

The synopsis has us very curious: "Assorted enemies pressure Rick and the group; the survivors and the prison may reach a breaking point."

What an art it is, writing such vague but tantalizing synopses. What or who are the assorted enemies? The sickness has to still be Enemy #1. One Ep 5 photo showed Hershel Greene (Scott Wilson) on the ground attending to someone, maybe giving them medicine. We see in the promo that Daryl Dixon (Norman Reedus) and Michonne’s (Danai Gurira) group is back at the prison, so they must have some kind of medicine to give to the survivors.

But who are the survivors by the time they arrive?

The promo shows Glenn (Steven Yeun) is still alive and coughing, for however long that lasts. For all we know, that’s a look at what was happening while we watched the supply runs last week. Dr. S. is also looking really bad. Dr. S. may not last through Episode 5, and if he dies we’re really going to feel bad for suspecting him of working with The Governor (David Morrissey) and doing any number of things he never had time to do since he was busy dying. Sorry, man.

In this 2-minute sneak peek for Ep 5, we see Hershel with Dr. S. (aka Caleb), who tells Hershel to focus on the ones who can make it. "You have a chance. This is it, after this." Hershel says, "I'm not giving up on anyone. Not yet." Hershel is the anti-Carol at this point. Her first instinct was to kill to save, his instinct is to help and sacrifice to save. Will it get him killed himself?

You’d think, as an old guy given this much proximity to the sickness, that Hershel would be sick by now, but he doesn’t even show any symptoms. That’s a good sign. Maybe Hershel will be fine. Or maybe he’ll get eaten by zombies, or shot, or die in another way. How awful to even come up with ways for Hershel to die, but come on — out of everyone in that prison, he is the most likely to die for any number of reasons, perhaps starting with his own instinct for self-sacrifice. (There’s also the rumor that the cast and crew had a death dinner over the summer for him. Maybe it wasn’t for him, but it was for someone. Or multiple someones.)

If you look around the 24 or 25-second mark of the promo, it almost looks like a flash of Hershel getting eaten by a walker. Maybe that’s not him — would they really give that away? — but someone ends up as a snack. The promo does show Maggie Greene (Lauren Cohan) banging on a door yelling, “Open the door!” so maybe she’s reacting to a decision her dad made? If not, who is she talking to?

Credit: Gene Page/AMC Photo: Maggie Greene Is Armed and Scared in The Walking Dead Season 4, Episode 5: “Internment”

The promo also shows Michonne dragging a body wearing jeans, outside at the prison. And Hershel sees a girl’s shoes, with a body lying on the ground inside the prison. Lizzie? Mika? What about sick Sasha (Sonequa Martin-Green)? Will she make it?Tyreese (Chad Coleman) just lost Karen, could he lose his sister too?

Speaking of stuff that involves Carol Peletier (Melissa McBride), she is currently out there on her own. Could something happen to her? Could she run into The Governor? Normally that would sound like way too much of a handy coincidence, but we do know The Gov is out there and returning at some point. A long time ago, TVLine said he’d have two “standalone” episodes that were rumored to air in the first half of the season. There are only eight episodes to the first half, so if that’s still going to happen it has to happen soon. Before seeing him in his “standalone” eps, we’re guessing they’ll give a hint of his connection to what’s been going on so far at the prison.

The Powers That Be are going out of their way to surprise us (Carol killed two people? Rick banished her?), so everything is completely up for grabs. What if Bob Stookey (Larry Gilliard Jr.) feels so guilty for his booze issue that he sacrifices himself? What if he’s pissed at the lack of support and decides to sabotage them? What if he’s always been in league with The Governor, since the character with his name in the comic books — also an Army medic with an alcohol issue — is actually friends with The Governor and saves the guy’s life after Michonne tortures him?

The illness is just one major enemy, and if we have an “assorted” mix pressuring the group, that hints to a larger issue. Maybe there’s even more going on in the prison. Maybe there are walkers on the loose taking more lives. Maybe that Sam kid from the suburban house found his old group (or a new one) and told them about the vulnerable prison eight miles north.

Whatever else happens, it sounds like more people will be turning in the prison and have to be put down. At the very least, expect some “redshirt” deaths of people we didn’t know too well, but also probably Dr. S., who seemed like a good guy after all. (Curse you, tricky editors!) Hopefully Hershel lives through this week, but his big speech a couple of weeks ago about what you risk your life for seemed like foreshadowing for his own death.

Do you think there will be a big death this week? Vote below!

The Walking Dead airs Sunday nights at 9 p.m. ET on AMC.