Filmed at the same time as Retour vers le futur 3 (1990). It was claimed at the time that in the four years since Retour vers le futur (1985) was made, Michael J. Fox had forgotten how to ride a skateboard. However, motor skills are not so easily lost (as in riding a bicycle), and Michael J. Fox has since stated that this was an early symptom of his Parkinson's Disease, although the medical diagnosis was not made until 1991.
The plot line of George McFly being dead in 1985-A was based entirely on Crispin Glover's refusal to do the sequel.
First film appearance by Elijah Wood. He plays one of the two video game boys to whom Marty speaks in the Cafe 80's near the start of the film.
To commemorate the release of a 30th anniversary Back to the Future trilogy Blu-ray and DVD release, a short movie called Back to the Future: Doc Brown Saves the World (2015) was filmed with Christopher Lloyd reprising his role of Doc Brown. In the movie, Doc tapes a video message, explaining that he traveled to the 2040s in a rebuilt DeLorean, and discovered that inventions such as the Hoverboard and dehydrated food will cause people to become massively overweight; even worse, a simultaneous glitch in every nuclear Mr. Fusion device on the planet will cause a nuclear holocaust that decimates the world's population. He subsequently travels back in time, and successfully prevents such dangerous devices from ever being invented, thus explaining why the future 2015 as seen in this movie did not come true in reality.
In the DVD extras of Retour vers le futur 2 (1989), Robert Zemeckis had said that he really did not want the movie to take place in the future. That is because he felt that every time that a movie takes place in the future, it is mis-predicted.
Charles Fleischer: Terry the auto mechanic from 2015 who wishes he had bet on the Cubs. Fleischer also plays his younger self in 1955, in addition to providing the voice for Biff's off-screen grandmother, Gertrude.
Robert Zemeckis: [police] The two police officers are named Reese and Foley, which are the names that director Robert Zemeckis and screenwriter Bob Gale use for any police or government agents in the films they have written.
Robert Zemeckis: [Celebrities] Computered-generated caricatures of Michael Jackson and Ronald Reagan appear in the Cafe 80's.