DVD and Blu-ray
The first season was released on August 11, 2008 in the United Kingdom, on August 13, 2008 in Australia, and on August 19, 2008 in North America. The Region 1 DVD set contains all nine episodes aired from the first season, commentary on select episodes, audition tapes for select actors, video of Summer Glau practicing for her ballet scenes, making of features, and deleted scenes for certain episodes. The Region 2 and 4 versions have all nine episodes but has excluded all the special features apart from one deleted scene. On the other hand, both the three-disc Blu-ray sets released in North America and Europe contain the same bonus features offered by the Region 1 DVD set. On the Blu-ray Disc set, each episode is encoded in 1080p, VC-1 compression with a 1.78:1 aspect ratio and is presented with a Dolby Digital 5.1 audio track.
The second season was released on September 22, 2009 in North America and on November 16, 2009 in the United Kingdom on DVD and Blu-ray.
In Ireland the second season was released along with a boxset containing the first and second seasons of the show on November 16, 2009. The North American release date was originally planned to "coincide with the home video release of the summer blockbuster Terminator Salvation", but the release of Terminator Salvation was later postponed to December 1, 2009. In New Zealand the second season DVD set was released on November 11, 2009 as was a boxed set containing both seasons.
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