I saw a brief clip of the last Dr Who confidential episode--and there's David Tennant, looking all nice and speaking about the Master in an animated and interesting manner--and then, the American actor, Eric Robers comes on. Now, mind you, he's a fair actor, certainly. But, if you really want to see the gaping difference between the British mind and the American mind, here's two quotes:

ROBERTS (On the character known as the Master):
"The Master is often described as an evil genius, because, uhh--he is evil."

TENNANT (Also commenting on the Master): "I think that when the Master was created, back in the 1970's, that the Doctor needed a Moriarty to his Sherlock Holmes."

Your average American probably thinks Sherlock Holmes is the name of some posh upper middle class housing development. :))

On a separate note, I read where David Tennant was upset to learn that the Master's screwdriver was bigger than his screwdriver....hmmm---screwdriver envy! You mean the Master's screwdriver is bigger than "teninches?" Oh, I think we've just opened a whole Pandora's box of brand new, blatantly obvious, erm--manhood jokes here, ey?