This is the first in a series of Terminator movies. Machines have taken over the world and are trying to destroy the human race. One man, John Connor, is leading a resistance movement against the machines. The machines decide to send a cyborg back in time to kill John’s mother, Sarah, before she gives birth, in order to eliminate the resistance movement before it ever starts. The humans send back Kyle Reese to protect Sarah. The story is readily interpreted as taking place in one-dimensional time. As it turns out, the plot is one big causal loop.
The Terminator. Dir. James Cameron. Perf. Arnold Schwarzenegger, Linda Hamilton, Michael Biehn. DVD. MGM, 1984.