5 Movie Time Travel Theories Explained

#3. The Terminator (1984)
Humans and machines are at war, and both sides send back their best soldiers to protect and assassinate, respectively, the woman who’s responsible for the conflict.

What it says about time travel
Technology for time travel won’t exist until 2029, and time travelers will only be able to travel back into the past, then return to the future from whence they came.

Real life time travel theory in play: The Grandfather Paradox
Similar to BTTF, going back in time to eliminate or hasten some occurrence with bearing on the future would inevitably cause a ripple in time. The Terminator method suggest traveling backwards at the speed of light (as opposed to 88 mph), with the term “backwards” referring to time instead of physical space.