Matilda Ledger and Heath's father Kim

The cult of the late Heath Ledger is set to grow with his astonishing performance in the new Batman film. Sean Porter was on set with the troubled Hollywood star, sterne for his last ever shoot. Here, he reveals what happened during those three manic – and spookily portentous – days

I'm breathless and Heath Ledger is downright furious. He rips off his frilly clown hat and hurls it to the floor. It's a Minute past midnight and the cameramen are looking at their watches and mumbling stuff about "the union". The director Terry Gilliam is beside himself too, as he scrambles around the set of The Imaginarium...