After a patchy third series, I thought the new one could be one series too many. How wrong could I be? Okay, we're only two episodes in, but it's already vintage stuff. 'My poor diseased brain!' 
Aww I have never seen it.
What is it on and when please?
Thanks.

channel 4, friday, 10:30 (after derren brown.)
if you get a chance to watch them in order they'll make more sense, though. great stuff!