Terminator 2: Judgement Day

He's back. The Terminator returns and he's one of the good guys, sent back in time to protect John Connor, the boy destined to lead the freedom fighters of the future. Sarah Connor, John's mother, is a quintessential survivor who has been institutionalized for her warning of the nuclear holocaust she knows is inevitable. Together, the threesome must find a way to stop the ultimate enemy - the T-1000, the most lethal Terminator ever created. And if they can survive, they can change the future...