The series picks up four years after the events of Terminator 2: Judgment Day with John and Sarah Connor hiding from the government. After two years in one place Sarah decides they need a change of scenery. Cameron Phillips, a reprogrammed Terminator sent to protect John, informs them that Judgment Day was not stopped and will take place in 2011.
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.
When John attempts to rescue Skynet’s latest target he finds himself closing in on Weaver, but at what cost? Game plans change, causing Sarah and Ellison to reunite. Meanwhile, Weaver learns Ellison’s secrets.
Fearing for her life, Sarah stashes John in a safe house. Cameron and Derek struggle to work together after she reveals a big secret. John Henry becomes compromised.
Jesse's submarine mission in the future takes a fatal turn that has unforeseen effects on John, Sarah and Derek in the present. Before heading out, Sarah deals with Cameron and John makes a tough choice.
Jesse has a flashback to a mission aboard her submarine, the Jimmy Carter. John and Sarah make plans to leave their house.