The Times Online have a womderful interview with RTD and David Tennant:
Tell us about the Easter special, Planet of the Dead.
Russell T Davies: People are going to be Doctor Who-deprived this year, so it’s got everything in it: CGI monsters, prosthetic monsters, army, police, an alien planet . . . It’s our last chance to have a bit of a laugh. Now the Doctor’s facing the end of his life, it’s going to get dark.
David Tennant: Some of it was filmed in Dubai, and there were sandstorms . . . We were despairing. I’d look into the distance and go (Acting), “What is this strange alien world?” Well, I couldn’t actually open my eyes to look at it. The Exfoliation of Doom would be a good subtitle. My hair was full of sand. And blonde. I looked like Tina Turner.
Read it all here