Agree with enjoying Mark Lewis Jones portrayal of his character. That scene where Megan talked to Dylan gave me the chills. Part of me feels that Dylan can't much help being how he is given the totally creepy and abusive mother that he has, and part of me is incredulous that both of them are psycho and participating in what's going on. Poor Nia - what kind of horrible childhood has she had? It's not clear if she's being physically abused, but how could she not be emotionally stunted? She doesn't seem to ever have any contact with any other people.
I'm hoping that Lowri will starting to move toward healing after talking to DS Vaughan.