I agree with your feeling that the unlikeable/not so popular characters will get offed first. I'm thinking we'll have Henry, Trish, Abby, Jimmy, Cal and Chloe till the end. Of course, this may just be me wishing alound. ;)

Wakefield being Abby's dad isn't something I thought of, but it's a valid theory. And as much as I've been suspecting Henry, having him just show up at the end of the episode with blood on his hands ... it all seems a bit too early and too easy. I'm finally starting to think he may be a red herring.

But if Henry's the red herring, I have no idea who the actual killer is. Each and every one of these people seem genuine, although my suspicions are shifting to Jimmy now.