Back to the Future Part II Author:Craig Shaw Gardner. Screenplay by Bob Gale Based on the movie of the same name. There was a time when Marty McFly was never in time for classes and never in time for dinner. Then one day, he wasn't in his time at all. Thanks to Doc Brown and his impossibly fast DeLorean, Marty returned to the past, changed the future (or present, depending on how you look at it), and then he... well... O... more »nly time will tell.« less