Well, if I have too blatant a clue, I give the game away.
Okay. Crysana, you know that screenshot you posted? One of the guesses for it had the director for this film.
Okay, here's another screenshot from the very same scene. I took it from Wikipedia's article on the film, but changed the file name so that the movie can't be guessed. In fact, I originally was going to use a shot not unlike this one, but thought the above one more challenging.
Have you seen the size of human brains? They're hilarious!
-The Twelfth Doctor