Batman’s Burden: A Director Confronts Darkness and Death

Christopher Nolan, the director of “The Dark Knight” — the follow-up to his 2005 franchise reboot, “Batman Begins” — is unperturbed by the rain, but a tiny detail irks him. “Hey, buster!” he shouts to the stuntman, craning his neck skyward and raising his voice for the first time all day (politely, as ever, but enough so he can be heard). “Could you turn yourself a little more to the left?”