In the original script, the dog Einstein was a monkey by the name of Shemp, believe it or not.

One detail that not many people might have noticed is that of Marty being a school librarian. He reads the RQ magazine (you can see one at the head of his bed), which is a magazine for librarians.

When Marty returned to 1985, Red was on a park bench that had the logo for California Raisins. The California Raisin Board paid the producers $50,000 for this product placement. However, since it was so dark and dirty, and since Red was covering up most of the logo, half their money was refunded. Submitted by Matty Blast

Wondering what the L. in Emmet's middle name stands for? It is Lathrop. This is discovered in the T.V. series of Back to the Future in the 2nd season episode 1 (episode 6 in all episode count). Unfortunately that was the last episode.

Mayor Red Thomas is actually Set Director Hal Gausman.

This movie is Billy Zane's first screen appearance. He plays one of Biff's side kicks. He's easiest to see just after Biff calls Marty's dad an 'irish bug'. Marty stares, then Biff grabs him to say 'you finished my homework yet?' He can also be seen just after Marty runs over the convertable later, kneeling in the back of the car before it crashes into the dung van.

November 5th is not only the date the Doc came up with the idea for time travel. Its also the birthdate of the father of the director. The director was looking through his father's high school year book when it occurred to him, what if he'd been his father's friend if he went back in time.

Crispin Glover (Mcfly Senior) also stared in Family Ties as one of Alex P. Keatons friends. Michael J Fox (Marty) played Alex P. Keaton.

Despite what the ending shows, the movie's producers originally had no intention of creating a sequel. The whole "To Be Continued" spot was just a joke. After the immense popularity of the movie, however, Director Robert Zemeckis and producer Bob Gale realized that they had to create a sequel and connect it to the "joke" ending of the first one. Submitted by Matty Blast

When the film was released in Spain and France Calvin Klein wasn't known at all, so the joke about changing Marty's name had to be fixed: In Spain he is called Levi Strauss and in France, Pierre Cardin. Submitted by Sacha

Stunt coordinator Walter Scott has a cameo as the driver of the pickup truck that gives Marty a lift to school.