The last two episodes were great, it's getting better each episode.
I'm thinking that Henry might not be the killer since the ending to the last episode made it too obvious but then it could be a red herring to make us believe that it's too obvious for Henry to be the killer. Give me one more episode and I'll have more solid theories. I've also got a feeling that either Chloe or Cal or perhaps both will die soon (
) but I think Beth will probably die next as she just seems like cannonfodder really.