The book for the musical was written by Bob Gale, who co-wrote the original films with director Robert Zemeckis, and then penned the film’s two successful sequels himself. The Broadway hit "Back to the Future: The Musical" comes roaring into Atlanta’s Fox Theatre this week — and Bob Gale wants to make you a promise. And Bob Gale would know. Gale co-wrote the original 1985 blockbuster "Back to the Future" with director Robert Zemeckis, and then penned the film’s two successful sequels himself. And click the video player in this article to hear more of our exclusive interview with the legendary Bob Gale!