Fat Man and Little Boy

Fat Man and Little Boy (a.k.a. Shadow Makers in the UK) is a 1989 film that reenacts the Manhattan Project, the secret Allied endeavor to develop the first nuclear weapons during World War II. The film is named after the weapons "Fat Man" and "Little Boy" detonated over Nagasaki and Hiroshima, respectively. The code names, originally Fat Man and Thin Man, were drawn from characters in the works of Dashiell Hammett. However, there's a possible secondary allusion to stout project director Gen. Leslie Groves and the slim scientific director, Dr. J. Robert Oppenheimer. The film focuses much attention on the frequently strained relationship between the two men.

The film was directed by Roland Joffe and written by Joffe and Bruce Robinson.