Long before Marty McFly and Doc Brown travelled through time in a flying DeLorean, director Robert Zemeckis, and his friend and writing partner Bob Gale, worked tirelessly to break into the industry with a hit. During their journey to realise their dream, they encountered unprecedented challenges and regularly took the difficult way out. For the first time ever, the story of how these two young filmmakers struck lightning with the Back to the Future trilogy is being told by those who witnessed it.