In a year of striking film images perhaps the most unforgettable is that of a man. His face smeared in clown makeup, gleefully sticking his head out of a speeding car, relishing the night wind and reveling at the chaos he has unleashed on the streets of Gotham city. Menacing, mercurial, droll, and diabolical. Heath Ledger as the Joker in The Dark Knight kept us all on edge anxious to see what act of appalling mischief he might commit next. With this bravura performance as well as with a wide ...