'Oppenheimer' depicts the scientist's affair with Jean Tatlock. Here's the real story about Oppenheimer's relationships with Tatlock and Ruth Tolman.

Florence Pugh as Jean Tatlock and Cillian Murphy as J. Robert Oppenheimer in "Oppenheimer."Warner Bros. Pictures

• Christopher Nolan's "Oppenheimer" looks at the life of the man who built the atomic bomb.
• J. Robert Oppenheimer led the Manhattan Project at the Los Alamos laboratory from 1942.

Although Christopher Nolan's "Oppenheimer" is mainly concerned with the explosive outcome of J. Robert Oppenheimer's work, the biopic paints a broader picture of his life – showing audiences the personal ramifications of creating a weapon as devastating as the atomic bomb.

Irish star Cillian Murphy plays the scientist alongside Emily Blunt as his wife, Katherine "Kitty" Oppenheimer. Their family is a key part of the story, as is Oppenheimer's raunchy fling with psychiatrist Jean Tatlock (Florence Pugh).

The affair wasn't made up by Nolan solely to spice up the movie, however. Oppenheimer really did have an affair with Tatlock while working on the Manhattan Project.