an icepick through the keyhole

You are the Fourth Doctor: A walking Bohemian conundrum with a brooding personal magnetism and a first-rate intellect concealed somewhere beneath your charmingly goofy exterior. You are perhaps the most terribly clever of all the Doctors, though your occasional bouts of childishness get you in trouble. You never go looking for a fight, but when someone messes with you... good heavens, are they ever sorry they did.