Another strong episode, this whole season has been terrific so far. I love the opening juxtaposition of the people in Woodbury drinking their ice tea and kicking back while everything is unravelling over at the prison.
The 3 graves would be for Lori, T-Dog and Carol, but I agree that it seems odd everyone is so willing to believe Carol is dead when there is no real evidence at all. On the other hand, WTF would she be? She's been gone awhile by now.
The scene with Michonne taking out the walkers was insanely awesome. The boot stomp in particular was frigging excellent. She really doesn't seem to try too hard to make a compelling case for leaving though. No mention (again) of the blood or bullet holes in the vehicle, all the stuff from the Governor's office, etc. Kinda hard to blame Andrea for not being convinced.
And oh yeah, Walker Arena!!! Not what I was expecting...was kind of hoping they would unchain the zombies and go for some kind of Thunderdome-esque free-for-all, but instead we just got Merle and some other dope pummeling themselves. Glad to see Andrea was appalled though, seems like the impetus she needed to get the hell out now. Nice nod to the comics on that one too.
Rick is in a pretty bad place, it's hard to watch. I gotta call BS on two things though: there is no way that walker ate ALL of Lori, sorry just not possible. Explain how he swallowed that femur please. And come on - the PHONES STILL WORK?!?!
Nice moment to end the episode on and all, but yeah, call routing would be the first thing to go and you can't generate your own internal dial tone with no power.