Back to the Future: The Game is an episodic graphic adventure based on the Back to the Future film franchise. The game was developed by Telltale Games as part of a licensing deal with Universal Pictures. Bob Gale, co-creator, co-writer and co-producer of the film trilogy, assisted Telltale in writing the game's story. Original actors Michael J. Fox and Christopher Lloyd allowed the developers to use their likenesses in the game for the lead characters Marty McFly and Doc Brown, respectively. Lloyd also provides the voice for Doc, while A.J. Locascio plays the role of Marty; Fox later appeared to voice two cameo roles in the final episode, reprising his role as future versions of Marty McFly in addition of playing his forefather William.