Lie To Me - Beyond Belief

This was probably one of the best episodes of Lie To Me but there was a potential for it to be incredibly brilliant and carry over to two episodes but it just comes to a neat conclusion.  Shame really.
The story starts with a woman attempting suicide in the office of a self-help guru by the name of David Sutcliffe, the operator of SRP.  Her daughter is trying to get to her but her mother has disappeared from the hospital, returning to SRP and is refusing to see her daughter.  When Lightman investigates, the woman appears like an automaton, spitting out the appropriate responses and is always accompanied by one of the staff.
The story starts to take on a nasty side, when Lightman arrives home and a brochure for SRP is sitting on his kitchen bench, even though neither he nor his daughter put it there and all the doors to the house were locked.  This could have been thr precursor to a spectacular battle of wills between Lightman and Sutcliffe, but Lightman uncovers Sutcliffe's real past and the end of the story comes pretty soon after that. 
A really cool concept for a story but could have been so much more.
And what is going on with Tim Roth? Is he ill?  Why has the show really been cancelled?