David Heyman

Because actually it's really hard to get things made. It takes years. To fight the fights you inevitably have to fight, even when you've produced Harry Potter, you'd better have the commitment and the passion to knock down walls, not take no for an answer.

It might sound odd, but I want to thank Michael Bay because he's been saying how important it is to show 3D with the right luminescence. And that's very important for this film, a lot of which was shot at night or with very low illumination.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.

The emotions triggered by fiction are very real. When Charles Dickens wrote about the death of Little Nell in the 1840s, people wept - and I'm sure that the death of characters in J.K. Rowling's 'Harry Potter' series led to similar tears.