I still haven't caught up with the first series yet, but HBO has just offered the first episode of series two of Ricky Gervais' EXTRAS as a free download through the iTunes Store.

Not really sure why, but HBO has this technically marked as a PODCAST, and NOT a TV show (perhaps it's to keep the filesizes small, since Apple seems to demand a much higher resolution for their TV episodes than the iPod can display).  Long story short, it will show up in your VIDEO PODCAST menu (oh, and you can still download and watch the episode even if you DON'T own an iPod-- iTunes works just fine).