23 episodes on DVD, plus the webisodes. The first 12 or so episodes are worth the price of admission. All of it is watchable, but the series did indeed start slipping. The remarkable excellence of the first half should not be missed - and you'll want to watch the rest, just because they do show glimmers of the early magic through the rest of it.
It really does help to be a film buff - they do bits from lots of different movies, and part of the fun is spotting the homage (and sniping) at a wide selection of movies. Some of them appear in the opening/closing credits, and change from episode to episode. The 'films' he reviews for his show are, thankfully, collected in the special features on the third DVD, and are well worth watching just by themselves.
