Ledger's performance has created a wave of excitement and praise from his co-stars, including Aaron Eckhart, who plays Harvey Dentand is involved in a tense, pivotal scene with the deranged Joker.
Relying on outsiders for more than a fifth of your sales represents a fairly big dent in many companies' definition of what they are: it erodes corporate boundaries and forces imperious types to co-operate with one another.