The Clone Wars – Season 4 – Season Pass has been available on the US iTunes for a couple of weeks now. The iTunes season pass allows you to download each episode of The Clone Wars as it becomes available, usually a few hours after they air on the Cartoon Network. The episodes can then be watched on an Apple TV, iPhone, iPod Touch, iPad, PC, or Mac. A season pass often includes some bonuses such as trailers and interviews with the cast and writers.
Two extras currently available are:
Sneak Peek with Dave Filoni – this is available as a free download and is the extended Season 4 trailer with a special introduction by Dave.
The Chosen One – Matt Lanter talks about Anakin with some brief unseen clips for the coming season.