By M. Giant
It looks like the group has decided to abandon the prison, emptying the cell block and loading up the cars. Because the Governor is indeed on his way, but not before exacting his revenge on both Milton and Andrea by knifing him and locking them in together so that Milton will eat her when he comes back. Andrea's lucky that Milton takes his time dying, because that gives her time to work on both getting her hands free and putting the finishing touches on her towering edifice of self-justification.
When the Governor and his forces show up at the prison, they light the place up pretty good but of course meet no resistance. He's pretty disappointed to find everyone gone, but leads everyone into the catacombs anyway, I guess to find some kind of fight. Once everyone's in there, though, it turns out our people are still in the house after all; they ambush the invaders and drive them out in a panic, despite the Governor's orders to stand their ground. He and his two must trusted henchmen are reduced to chasing after their own people to return to the fight. In fact, I think the only Woodburian who gets killed at the prison is the one who has the bad fortune to run into Carl in the woods. Who's so butt-hurt about not getting to take part in the fight that he remorselessly kills one of the invaders in cold blood. And just when we were starting to like him, too.
The Governor, Martinez, and Shump catch up with his retreating army on the road, and after a brief argument about whether the prison is even worth the battle, the Governor just up and massacres all of them (including Tyreese's old buddy Alan), then hits the road with Martinez and Shump. While chasing the Governor so they can put an end to all this, Rick, Daryl, and Michonne come upon the scene and rescue a Woodburian named Karen. She accompanies them back to town, where, after an abbreviated firefight with Tyrese and Sasha (the only able-bodied people left behind to guard the wall and the children and elderly of Woodbury), they find the room where Milton breathed, and then slavered, his last. Yes, Andrea managed to take him out, but not without receiving a fatal bite. She sticks around long enough to say her farewells to her old compatriots, and then checks out using Rick's service revolver. Considering all the carnage she could have prevented, it's probably better than she deserves.
So Tyreese and Sasha get to move into the prison after all, and this time they've brought even more people -- every person in Woodbury who was too old or too young to attack the prison in the first place. Looks like Rick is making up for that hitchhiker from "Clear" in a big way. The good news is that Lori's stopped haunting him, and the Governor seems to be gone. The bad news is that going by what Carl said after killing that kid, Rick might just be raising a new problem.