Cancer: The Emperor of All Maladies is a 2015 American documentary film directed by Barak Goodman and produced by Ken Burns. The film, in three-episodes of two hours each, is based on the Pulitzer Prize winning 2010 book, The Emperor of All Maladies: A Biography of Cancer, by Siddhartha Mukherjee, and describes the history of cancer, and cancer treatments, particularly in the United States.