6
votes
1answer
325 views

Doc knows he will invent time machine 30 years ahead and it doesnt change the future

In Back to the Future, Doc invented time machine in 1985 and he was really excited and little surprised that it worked. But later in movie, Marty goes back and tells young Doc about it. Why was Doc ...
18
votes
2answers
9k views

Back to the Future Part 3 - Why doesn't Marty use the other DeLorean?

In Back to the Future Part 3 Marty follows Doc back to 1885 to rescue him from being shot at the hands of Buford 'Mad Dog' Tannen. He arrives in 1885 some time after Doc has written the letter that ...
9
votes
1answer
328 views

Why didn't they keep the brakes on when revving the Delorean to 88mph?

In the first movie, they had the Delorean rev up with the emergency brake turned on and the speedometer revved up close to the magical 88mph. What I'm wondering is why they didn't just have the car do ...
31
votes
7answers
5k views

In Back to the Future Part II, how could old Biff have made it back to 2015?

So in Back to the Future Part II, Doc picks up Marty in 1985 and takes him to 2015. Then old Biff realizes the Delorean is a time machine. Old Biff steals the Delorean and travels from 2015 to 1955 to ...
44
votes
7answers
2k views

Why does George Mcfly employ Biff to wax his car after he had previously tried to rape his wife?

In Back to the Future, Marty goes back to 1955 and devises a plan for his father George McFly to win over Lorraine in order to ensure Marty's survival. The plan involved Marty pretending to sexually ...