Commentary As a lover of Sci-Fi , Back to the Future is one of my favorite movies of all time. I've always loved stories about time travel, and this is one of the best. The movie has just about everything, including time travel, adventure, humor, and teenage romance. The acting is also quite good, especially Christopher Lloyd's role as (Doc) Emmett Brown, the nutty professor who builds a time machine out of a DeLorean. I have watched Back to the Future and its two sequels several times, mostly on videotape. The sequels are also very good, but the original is the best.
Plot Summary Marty McFly (Michael J. Fox) is a rather typical 17-year old boy who enjoys playing the electric guitar and skateboarding. He is friends with Dr. Emmett Brown (Christopher Lloyd), a wacky old scientist who builds a time machine out of a DeLorean. Dr. Brown demonstrates the time machine to Marty one night in a shopping mall, but ends up getting hunted down and shot by a group of Libyan terrrorists. Marty uses the DeLorean to escape, but ends up traveling 30 years into the past, in 1955. Once there, he encounters his parents as teenagers and inadvertently jeopardizes their falling in love and thus his own existence. Marty's mom also develops a strong crush on him. Marty meets up with a younger version of Dr. Brown in 1955 and the two try to fix things up, first making sure his parents fall in love and then getting him back home safely.
Time Travel I mainly like Back to the Future for its Sci-Fi aspect, which is primarily centered around time travel. There are several stories and movies about time travel, and this is one of the best. Back to the Future uses the following two time travel paradoxes:
The Grandfather Paradox: The time travel paradox presented in Back to the Future is a variation of the "grandfather paradox", in which someone travels into the past and kills their grandfather, thus preventing their own birth. Marty does the same thing by preventing his parents from falling in love, thus jeopardizing his own existence. A photograph of Marty and his two siblings taken in 1985 is used as an indicator of what will become of them in the future. I've never seen this device used in any other Sci-Fi movies or stories than in the Back to the Future trilogy. (Variations of the same idea are also used in the two sequels.)
Alternate Timelines: Each of the Back to the Future movies also play around with alternate timelines. At the end of Back to the Future, we find several things about Marty's family which have changed for the better once he returns, due to how he had changed things in the past.
Here's the original trailer.
Here's the classic scene of Marty performing "Johnny B. Goode".
The Back to the Future Soundtrack MP3 - Johnny Be Good