I'm a huge fan of the new Doctor Who series and I think David Tennant may be the best Doke-tah ever. Too bad he's leaving the show soon.
That's the sonic screwdriver the Doctor's holding there. When it was introduced back in the 1970s, he used it to lock and unlock doors. Over the years the sonic has grown more and more powerful until now it can do pretty much anything it needs to do. The Doctor still uses it to unlock doors, but now it can access & control computers, start cars and even darken the lenses of the Doctor's reading glasses and turn them into sunglasses (!).
Based on a doodle in my sketchbook, this was one of those illustrations that I thought would take no time at all. As usual, it ended up taking forever. You'd think by now I'd realize a drawing takes more than 15 minutes, but it seems to surprise me every time.
Drawn in Photoshop with the graphic tablet.
Here's the original sketch of the Doctor. Look closely and you'll see that his legs are a lot shorter here. I lengthened them quite a bit in the finished drawing to accentuate David Tennant's gangly frame.