The second season was split between Season 2.0 (2.01 through 2.10) and Season 2.5 (2.11 through 2.20) and is split into two separate DVD packages. If you've got it from Netflix or Amazon you'll have to order the second half, or catch the reruns. Personally I'd advise catching the reruns or renting the second set rather than buying, as the second half of Season 2 is pretty uneven. There's some great stuff in it, and it picks up towards the end, but there are a couple of pretty lousy episodes in there. On the bright side, it sounds from the podcasts like Moore & Co. are aware there were some problems with 2.5 and aren't living in a dream world where everything is wonderful. Self-awareness is half the battle.