Terminator 2: Judgment Day (1991) | James Cameron

Linda Hamilton returns as buffed out Sarah Connor, the mother of humanity's future savior, now holed up in a mental institution for her claims that the world is going to end in an apocalyptic nuclear war instigated by a sentient advanced computer system.  That savior, John (Edward Furlong), is a rebellious teen living in foster care who soon learns his mother isn't a crackpot after all after being chased by a cop who is actually a T-1000 model Terminator - a shape-shifting, liquid metallic artificial entity (Robert Patrick) - sent from the future to kill him.  John's own savior is a T-800 cybernetic organism (Arnold Schwarzenegger) identical to the one sent to kill Sarah years before, only this time, his future self reprogrammed one of them to send back and protect the boy and mother.  However, the older model is barely a match for the nearly indestructible, futuristic killing machine, and a chase ensues that sees Sarah and company trying to stay alive while destroying the path to humanity's downfall, the advancements learned through the finding of the chip and hand remnant from the previous T-800 machine. James Cameron co-writes and directs this big-budget smash.