In the year 2018, a new half-human and half-machine weapon in the war against the machines visits John Connor the night before a resistance attack on Skynet. John Connor must decide whether or not to believe what the weapon tells him.
Currently you can stream Terminator Salvation via HBO Max, a great platform with lots of good movies. You can also buy or rent Terminator Salvation from platforms like VUDU or FandangoNOW for as little as $3.99
If you don't have HBO Max but you still want to watch Terminator Salvation online then you can buy or rent the movie from platforms like VUDU, Redbox and FandangoNOW for as little as $3.99.