Back in January, at a taping one night we were told that a crew from E4 (a British TV channel) was there to film a behind-the-scenes special for The Big Bang Theory. And last week, during the airing of episode 100 in the UK, the specials finally aired!
There were two half hour specials, both of which have been uploaded to youtube:
Access all Areas - Part 1, Part 2
It All Started With a Big Bang - Part 1, Part 2
I haven't had time to watch them myself yet, but they look to contain plenty of cast interviews and behind-the-scenes goodies!