Yeah I'm not gonna lie keeping my head up with that episode was a wreck and I think I failed the exam. I mean I have a lot of what happened set in my mind but there is a absolute buttload of what the smurf going on and I'm going to have to read up on what I just watched later so I can get my head around it. This episode, for a schmuck like me, was just being a wee bit too clever.

EDIT: Oh, and Stubbs is deliberately inconclusive on the current evidence provided, imho, and is written to be exactly that.