Terminator 4 is about the war against the machines.

Terminator 3 is about a future leader trying to stop the war to come.

Terminator 5 is about a man sent back in time to save the human race.

The Terminator is about a woman who gets caught in the middle of a future war to save humanity.

Terminator 6 is about a woman who gets caught in the middle of a future war to save humanity.

Terminator 2 is about time-traveling cyborgs trying to alter the course of history.