John and Cameron break Sarah out of prison with a little help from Cromartie.  The meet up with Weaver who shows her true identity while trying to protect them from a drone.  She tells them, when they find Cameron with a missing CPU, that she is trying to combat Skynet with her John Henry.  She activates a time machine where she and John head into the future.  Sarah and Ellison stay behind.  The future that John arrives in is not the ones he's been told about however.