Rick and his group manage to get as far as a restaurant before hearing the alarm and ducking into a closed restaurant with quilts over the windows. "Rick, how'd you find us?" Maggie demands. Right now they're more worried about where Michonne is. Well, except for Rick, who says she's on her own, because they have to get their people back. Glenn tells Daryl, "This was Merle... He did this. He threw a walker at me. He was going to execute us." Daryl asks if this means his brother's the Governor, which evokes a whole alternate universe for a moment there, but Maggie says that's someone else. "Your brother's his lieutenant or something." Daryl asks if Merle knows he's with them. "He does now," Glenn says. "Rick, I'm sorry, we told him where the prison was. We couldn't hold out." Rick says there's no need to apologize; they just need to get back. Daryl wants to see Merle and try to work this out, but Rick says this isn't the time. "We're in hostile territory." He tells Daryl he needs him. "Are you with me?" Daryl says he is.
In Milton's lab, Andrea watches as the Governor locks and loads. Merle and whatever's left of the research team come in, and when Andrea asks what's going on, Merle explains, "Some assholes want what we have." Yes, their friends. The Governor and his goons are ready to roll out, and Andrea wants in on the shooting, but the Governor wants her to do the door-to-door checking to make sure everyone's safe. Andrea's too good for that, of course, but the governor insists. Not that Andrea's remotely happy about it. And not that she won't jump on the first opportunity to do the opposite.
Michonne is, where else, back in the Governor's place. She draws her sword and sits down on a chair in the dark to wait for him to get back, with the weapon across her lap. Don't fall asleep, Michonne. You're likely to lose a finger.
Rick's group is ready to move. After throwing a smoke grenade out the door, I guess to give away their position and attract as much attention as possible, they move out into the street, where they start exchanging fire with the people on the walls. Andrea sees the silhouetted figures in the cloud and of course starts shooting into the smoke, without possibly having any clear idea of whom she's aiming at. How many times does she need to shoot poor Daryl, anyway? Fortunately she misses everyone. The Governor spots her and joins her as the firefight moves down the street. He asks her if she's okay, and she says, "I saw them." The Governor does a panicked double-take at that. While Rick and his people regroup in an alley, Andrea tells the Governor about the young black guy in a prison jumpsuit, because of course the only one she saw was Oscar. He tells her to get off the street and joins the townspeople moving in on the intruders' position.