Inception and Interstellar director Christopher Nolan is a master of the large-scale blockbuster, but he still thinks the small things are the most important.

Nolan has revealed that he scheduled filming for Oppenheimer around lead actor Cillian Murphy so that the star would not have to wear a wig for it. In the movie, Murphy plays J. Robert Oppenheimer with various different hairstyles as Nolan tracks the life of the so-called "father of the atomic bomb" from the 1920s to the '60s.