This episode was the best one so far.
The girl Maddison, was really creepy & phsyco. The way she just threw herself from the tree-house and said that Rebecca pushed her, she really needs some professional help.
As soon as it was obvious that Maddison was lying & that she was a bully, I knew that she was the killer.
Henry's mother being killed right at the end by Maddisons mother was unexpected, because I thought that Maddison would have probably killed her somehow.