Trivia: Looking at the three films at a whole, we can note that no fewer than FOUR DeLoreans were simultaneously existing in 1955: (1) the one in which Marty comes in the first movie; (2) the one in which the old Biff comes in the second movie to give the Sports Almanac to his younger self; (3) the one in which Marty and Doc come in the second movie to rescue the Sports Almanac; and (4) the one which Doc hid in a mine in 1885 to be found by Marty in the third movie.
Trivia: When filming the scene where Marty is being hanged from the clock tower, Michael J Fox agreed to really hang from the rope. Whilst filming, Fox held the rope away from his throat with his hand. At one time he wasn't holding the rope and was really being strangled. The film crew didn't realise, they just thought it was really good acting, until he passed out.
Trivia: Doc tells Clara several times that Jules Verne is his favorite author. There is a serrated rail on the cow catcher of his locomotive time machine that is nearly identical to the rail on the front of the Nautilus in Disney's adaptation of Jules Verne's 20000 Leagues Under the Sea.
Add timeGrumpy Scot
Trivia: In BTTF 1, the first words in the movie are from the radio, and it is an ad for Statler Toyota. When Marty sees the black truck, before he time travels, it is being driven to Statler Toyota. When Marty walks into Hill Valley 1885, there is a billboard in the background for an honest Joe Statler, who buys, sells, and trades horses. Seems like the Statler family has been in the transportation industry for quite some time.
Trivia: When Marty and Doc are looking at the map, finding a straight route for the train to take, for a moment the clock (the one that will be put in the clocktower later) can be seen. The time shown is about 10:04 AM. While the time at which it will freeze in 1955 is 10:04 PM, visually the times look the same.