Colin Firth has transformed himself, body and soul, for The Mercy role

Colin Firth has the best performance of the year in The Mercy and went through a painful transformation to achieve it, mentally and physically, even starving himself in order to become gaunt. Rachel Weisz is amazing in her role too. They talk about how they prepared their roles, learning about Donald Crowhurst's tragic story, taking sailing lessons and living with this character in mind all the time.