OMG WTF
SO many things in this episode! The flashback connections! (I pride myself on noticing that Ana and Jack's dad had the aliases Sarah and Tom, which were the names of Jack's wife and Kate's lost love) Ana/Sawyer!
AND THAT ENDING!!!!! WTF?!
I haven't read any communities yet so don't know what the speculation is (and I'm spoiler-free- nights like this make me glad I am!) but WTF... I'm saying either he just snapped, or the Others put him up to it (like said that they'd kill Walt unless he did it or something) or I don't know... WTF WTF WTF WTF!!!!!!! kflaj;dkla;ld;kal;dakldk;lda;