The Doctor Who: Series Four, Part One DVD is released today in the US and, like the previous releases, there is no Blu-ray release. The DVD includes all new bonus material.
This series was Catherine Tate's series as a full-time companion, playing Donna Noble.
The DVD's run time is 345 minutes and it is believed that it will include the episodes:
Partners In Crime
The Fires Of Pompeii
Planet Of The Ood
The Sontaran Stratagem
The Poison Sky
The Doctor's Daughter
The Unicorn And The Wasp
Source:
Doctor Who: Series Four, Part One order link on Amazon.com
Doctor Who section of DavidTennantOnTwitter.com