2
votes
2answers
217 views

Crossing your own timeline, changing the future - how does that work?

There are many movies and TV episodes in which a character "crosses his own timeline", sometimes even meeting his past or future self (e.g. The Day of the Doctor). Technically, I should say meeting ...
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 ...
30
votes
7answers
4k 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 ...
43
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 ...
55
votes
7answers
2k views

Why don't Marty's parents ever mention how similar he looks to the Marty of 1955?

Although Marty is only in 1955 for one week, he plays a pivotal role in getting his parents together. He even briefly dates his mother. So, considering he plays such a pivotal role, does it make sense ...