Flashing in and out of consciousness, fighting for his life Derek Reese recalls his future life battling the machines in 2027. Meanwhile, Sarah tries to explain the past to Charley.

John and Derek infiltrate a military academy in order to protect an integral member of the future resistance. Meanwhile, Weaver’s first assignment for Ellison takes an interesting turn of events when he discovers a specter from his own past.

While fighting to stay alive, Sarah is guided by the image of John's father. Weaver's attempt to protect John Henry has deadly consequences.

Fate is changed forever on the explosive season finale episode! The Connors come face-to-face with Weaver in a confrontation that shakes John to the core and changes his reality. Nothing will be the same.