Doctor Who: The Lost Season
(from Doctor Who: The Trial of a Time Lord)
Brief featurette about the abandoned plans for the original season 23. They're illustrated, and someone clearly had too much fun drawing Peri's chest.
Three of these missing stories were novelised, donchaknow, and I read them all about 10 or 11 years ago. Go me.
I love features like this, about 'lost' stories. There's one on the Survival DVD too, but I don't think I got round to watching it. Maybe I'll do that now...