Holy damn that was dark.
I've been enjoying the almost character studies, and long-overdue character development, in the recent episodes, and I've thought that they've pretty much all been done well (particularly in comparison to the first half of the series)... but man, this was on a totally different level. Gimple took the group that I imagine most people care least about, and built them up to not just one, but two of the most gut-wrenchingly devastating scenes of the entire show.
A lot of the recent character development has been broken characters who have lost their humanity coming back from the brink and starting to feel again - Rick and Carl, the Governor, Michonne, Beth, Daryl, and I think I'll throw Tara in. We also saw that, in this episode, of Carol (who finally did something that needed to be done that was so terrible it shattered her steely shell), and Tyreese (who forgave someone who coldly murdered the woman he was crushing on).
In stark contrast to all of this, however, was poor little Lizzie. Aye, she was broken and losing her humanity, but sometimes there's nothing to be done. Sometimes a person just cannot come back from the brink. What makes it all the more tragic is that sometimes, people break because they just don't understand what's happening.
Whilst I'm somewhat surprised that TWD would shy away from L'il Asskicker being nommed but not the murder of two young children, this episode truly fulfills the promise of TWD being about the real walking dead, not the zombies. The zombies aren't the threat in this world, it's the any means necessary survival. It wasn't pretty, but hats off to the TWD team for having the balls to put us in such a "What would you do?" situation, and for having the skills to pull it off so perfectly.