Darn...I kept dozing off during the show and only got to see part of it! I saw Andrea running through the woods, but don't know why or how she got there!
In case you don't want to know, I'll preface this by saying ***SPOILERS AHEAD*** I love the IMDB spoiler blocker, but we don't have much use for it on this site, so We'll have to do without. :/
So shit went South, and quickly. Zombies/walkers were over-running the farm in droves. BTW, did anyone notice the trouble they had with the fences? If they were stronger, the walkers would have been held at bay! I am so going to survive the Zombie Apocalypse if/when it comes!
But I digress...
So everyone is in a shootout killing every walker they encounter. Scores of dead-undead (re-dead?) bodies litter the farm. Rick and his worthless kid (God I wish he and Lori would have gotten killed!) are in the barn and torch dozens before they leave. Jimmy gets killed in Dale's RV, and Patricia gets eaten; nobody will miss either of them, they both sucked! The group gets divided and leave in three cars and Daryl on his motorcycle, but
Andrea gets left behind in the chaos.
She picks up a bag of guns and starts popping caps in zombie asses (or heads) like a man woman! The horde chases/drives her into the woods where she drops from exhaustion. Just as a walker is about to pounce on her, a mysterious woman (this is Michonne from the comics) with two pet zombies on chains slices the walker's head clean off, and saves Andrea's life. After that, it was the not-so-shocking revelation of them all being infected, and the episode ending with them not knowing where they'll go next.....which of course will be the prison!