

When we last left our heros 4 years earlier, Doc had just arrived telling Marty and Jennifer that the future of their kids has to be fixed. What's wrong? Well we're about to find out.
Doc, Marty and Jennifer travel to the year 2015! Marty and Jennifer are now married, with two kids. Now there is a problem. One event destroys their family's future, so Marty has to fill in for his son to stop this chain of events. All he has to do is say "No" to everything that Griff Tannen says. Of course though everything goes totally different to plan...
I won't spoil it for you, but there is a great scen involving 'hoverboards.' While this is happening Jennifer has been taken to her future home by the police! Marty and Doc go to find her. They do, but while they get her, Biff Tannen takes the DeLorean and the Sports Almanac (A book that Marty brought containing every result of every major sport from 1950!). Biff has given the book to himself in the past, so he can become rich.
Marty, Doc and Jennifer don't know this and go back to 1985, but soon discover that it's totally different! Biff owns everything! But what's worse is George has been murdered by Biff and Lorraine is now married to Biff instead!
Doc and Marty discover that Biff gave the book to himself in 1955! So they go back and have to get the book, but at the same time not bump into themselves and destroy the events taking place from the first trip! There are now two Doc's and two Marty's in 1955!
If you want to read on about the plot click here!
This is a brilliant story! There was never a dull moment and I really enjoyed the special effects, especially in the future, when they have the hoverboard scene. The special effects, again, were very good. Just the high standard of special effects in nearly every scene was breath-taking at times. I liked how they put two Docs and two Marty's on the screen at the same time.
When they went back to 1955 and we got to revisit back to the future, that was a brilliant idea! I would have to say that this was easily the best storyline fo the three movies. There were many unexpected twists to the story. Sound quality was a little bit better than Back to the Future and the acting was better. Doc wasn't so insane, which made him more believable, Marty was more like a teenager and the rest of the cast did very well. The changes in the characters through time, was good to see. A good example is Lorraine. In the alternate 1985 she looks different to 1955 and really different in 2015, but she always has the same qualitys.
Overall I would give this movie 9 out of 10! I enjoyed this movie so much and I totally recommend it to people of all ages.