its obvious that its lucas he called allison a b-word in one of the episodes and he told mona that one dia allison is going to get what she deserves one dia after allison told everyone he was a hermaphrodite. and he looks very secretive.
I think it's that boy with the black curls, Lucas, that friend of Hanna. I saw the front part of the seguinte episode he took Hannah into a boat, he kidnaps Hannah. But seguinte episode we're sure who A is. someone calls the phone that the girls had found, and you can hear the voice. I think that the voice of A should be. I'm curious about the seguinte episode!!!