The first* series of Ashes to Ashes will be out on DVD on 5th May. The main online shops are selling it at about £26.
The DVD extras include:
Car explosion featurette
Set tour featurette
Life After Mars - behind the scenes of Ashes to Ashes
Audio Commentary on Episodes 1 &2
Watch a trailer for the DVD on amazon.co.uk
*"The Gene Genie will be back next year in a brand new series featuring even more 1980s classics, Quattro action and blue eyeliner".(source BBC website)