ABC1 10pm The Genius of Photography - Fixing the shadows episode 1 of 6.
It was really great the first bit had me hooked they completely darkened the room and then cut a hole in the blackout curtains and through the hole the outside world was projected upsidedown and back to front on the walls of the room.
I couldn't find a place to view the episode online for any who missed it I hope that any that missed that are interested can find the first episode it is very entertaining and informative.