What else is there from series 1?

I've recently got into the show, working through it beginning to end, starting series 6 next.

Series 1 has been my favourite series of them all still. I think all the contestants were great, and I especially love Tim Key. I'm just wondering if there is anything else to check out that has all the series 1 contestants. I saw a video of Alex interviewing them, and I've heard of unreleased deleted scenes. Is that all there is to series 1?