Yes I watched it and was surprised as I am sure I have seen a similar show about him a few years back (Who Do You Think You Are or something).
And yes his story is so grim - and yet he seems to positive!
I wonder has anyone ever asked his foster parents why they behaved like they did? Or even contacted their children who he thought of as his siblings.
The bit I didn't know was the school friend who made all that effort to find out where he had disappeared to. It seems like no one else did.
And I am sorry that things dont seem to have worked out with his mother (or did I misunderstand) and how strange for her to have what it also her story broadcast to the world.