Christopher Nolan's next film, Oppenheimer, focuses on the titular scientist, who is considered the father of the atomic bomb. Cillian Murphy is front and center as the man himself, backed by an all-star cast – but one thing that has caught everyone's attention is the trailers switching between full colour and black and white, harkening back to 2000's Memento.
There have been plenty of theories regarding how and why exactly the film is split like this. Many believe that the color sequences take place before the detonation of the bomb, with the black-and-white scenes taking place afterwards (such as the court scenes with Robert Downey Jr.'s character Lewis Strauss) – a metaphor for how the creation of the atomic introduced a new chapter for our world.
