Bob Gale co-wrote the sci-fi film directed by whom?
Bob Gale:  He famously co-wrote the science fiction film "Back to the Future" with writing partner Robert Zemeckis, and the screenplays for the film's two sequels. Back to the Future: Back to the Future is a 1985 American science-fiction adventure comedy film directed by Robert Zemeckis and written by Zemeckis and Bob Gale.
Robert Zemeckis