The supplemental features on The End of Time are more plentiful than on most of the Tennant/Who DVD releases, though still not quite on par with the archival disc presentations. Tennant is front and center, naturally, for most of the extras; he's on both commentary tracks, with Catherine Tate (Donna) and director Euros Lyn on part 1 and Davies, the amusing Simm, and Lyn on part 2. Both are exceptionally light and upbeat, as are his video diaries, which cover all of the 2009 special episodes. Then it's off to Comic-Con with Tennant and Davies for a 20-minute capsule of their appearance at the 2008 edition of the pop culture juggernaut, as well as some cute BBC Christmas IDs and a handful of deleted and mostly forgettable scenes. Episodes of the behind-the-scenes series Doctor Who Confidential round out the two-disc set. --Paul Gaita