Well, we all know how great the show is, how perfectly cast it was and how addictive it can be, and one hell of an idea for a tv show. However in the DVD, there are no extras... but what will really bake your noodle is the continuity errors. At the end of season 1 Sam leaped into the body of a woman in the bath, but that isnt the first episode in season2, in fact it turns up a few episodes later.
There's also the episode where Sam leaps into the body of an old black guy sat in a whites only restaurant, this leap turns up at the end of 2 or 3 episodes for some reason, but nowhere in season 2 do we actually get to see the complete episode. Also Sam leaps into a guy who's just had sex with a girl in a haybarn, but we dont see that episode either. I have seen both of these episodes before when they were on TV, so why they are not in this boxset is beyond me. They are also not on the season 3 boxset either.
So, apart from the continuity, and the fact that there seems to be 2 missing episodes so far, the show itself is flawless. Lets just hope that those 2 episodes will resurface on the season 4 or 5 boxsets.