Doing ground-breaking cancer research and writing a Pulitzer Prize-winning book are probably amongst the toughest things in the world but Dr Siddhartha Mukherjee has done both. Now, he is collaborating with filmmaker Ken Burns on a documentary inspired by his powerful book The Emperor of All Maladies: A Biography of Cancer. The film will be directed by award-winning filmmaker Barak Goodman and air on pbs in Spring 2015.