Machines (2003) In the third film, a T-101 Terminator portrayed by Schwarzenegger is reprogrammed to protect John Connor (Nick Stahl), as well as his future wife Kate Brewster (Claire Danes), from a T-X (Kristanna Loken). The T-X is also designed to destroy other Terminators. The T-101 is powered by two hydrogen fuel cells, one of which it discards after being damaged by the T-X. This Terminator, unlike the others, is more familiar with human behaviors. The T-101 tells John that his efforts in the second film did not stop Judgment Day, but merely delayed it. Eventually, the T-X uses its nanites to take control of the T-101's autonomous functions, sending it to kill John and Kate. Since the T-101's core consciousness is still intact and it just lacks physical control of its body, John is able to incites the T-101 to shut down by reminding it of the conflict between its current actions and its programmed mission to ensure his and Kate's survival. The T-101 later reboots itself free from the T-X's control. As John and Kate retreat to a bunker to wait out the now-inevitable nuclear war, the Terminator is destroyed when it jams its remaining hydrogen fuel cell into the T-X's mouth, resulting in a massive detonation that destroys them both. This T-101 also is revealed to have played a very important role in John's previous future: it is the one that kills John in 2032 after being chosen due to John's emotional attachment to its model, based on the events of Terminator 2. Despite this, John remains trusting it. Later, the Terminator is captured, reprogrammed and sent to the past to make sure that young-adult John and Kate would survive the start of the war. As a result of John's death in the future, it follows Kate's orders rather than John's, unlike the Terminator in the second film. Terminator Salvation (2009) In the fourth film, the T-800 has a small role, though once again as an antagonist. It engages John Connor (Christian Bale) in battle during John's attempt to rescue Kyle Reese (Anton Yelchin) from the Skynet base in San Francisco. John holds his own with his advanced weaponry, but is unable to stop the Terminator until it is drenched in molten metal and then liquid nitrogen, freezing it temporarily. As John begins planting hydrogen fuel cells, cyborg prototype Marcus Wright (Sam Worthington) arrives to stall the