Unless you're a die hard Whovian, most people don't know who David Tennant is. He's member of the RSC (Royal Shakespeare Company) born in Scotland and a versatile character actor. You've probably seen him before and don't even remember it. Did you watch Harry Potter and the Goblet of Fire? Remember Barty Crouch, Jr? Then you've seen David. It's okay, when I watched this movie with my kids, at the time, I didn't know who he was either.
This is a fan-made video to the music of Cris Angel's show "Mindfreak" but all the video clips are of David as Barty Crouch Jr...enjoy!