I was digging up the date of the fuji rock show and this link popped up in the results:
http://www.bbc.co.uk/iplayer/episode...ane_Horrocks!/
Karl is introduced around 2:04:00 but really starts around 2:17:00 and continues through to the end (I think). Talks about making movies, touches on making of edgelands, etc.
Edit: AN ANNOUNCEMENT OF A RICK AND KARL ANNOUNCEMENT AT THE VERY END!! =D=D