Doctor Who fans will get a kick out of today's Lunchtime Quiz at mental_floss.
In the 45-year history of the BBC science-fiction series Doctor Who, ten different actors have played The Doctor (not counting movies, one-off charity specials, stage shows or audio dramas). Can you name all ten before time runs out?
You have three minutes. I didn't even attempt this, since I don't know the answers. You will, no doubt, do better. http://www.mentalfloss.com/blogs/archives/16282