After the Jeep explosion, John's 16th birthday makes him confront the fact that he's destined to be alone. Meanwhile, after Cromartie's massacre, Agent Ellison must face off against both the Feds and his faith.

Cameron and Sarah take the initiative to investigate a nuclear power plant. Meanwhile, John loses interest in academics, but makes a new friend and chafes at being treated like a child.

Derek and Sarah must outwit Cromartie after he kidnaps Charley's wife, and they must weigh the consequences in rescuing her. Meanwhile, John finds himself unable to choose between Cameron and Riley.

Cameron has a software glitch and loses her memory, causing her to leave the Connors. She is taken in by a homeless kid named Jody, who ends up at a halfway house with her. Meanwhile, Agent Ellison meets with Catherine Weaver to talk about his future with Zeira Corp.

John and Derek protect a future member of the resistance at a military academy, and Weaver gives Ellison his first assignment.

Sarah, John, and Cameron track down another name on their list. Meanwhile, Derek gets a visitor from his past.

The Connors get robbed, which puts them on high alert. Meanwhile, one Terminator gets very close to John, while another Terminator terrorizes Agent Ellison.

John and Riley face some fatal aftermath on their trip to Mexico. Sarah and Ellison finally meet up.

Sarah experiences deja vu when she has disturbing nightmares, meaning trouble for Sarah and John. Derek and Jesse look into a Skynet collaborator.

Sarah catches up with the Turk. Jesse faces some problems in her plans. Ellison has a surprise meeting with someone powerful through Weaver.

Cameron's secret is exposed. A Terminator sent to the wrong time causes catastrophic results changing history.

Sarah and Cameron attempt to save a family whose fate links in with Derek in the future. Jesse fights for her life.

Sarah's continued obsession with the three dots leads her to a blogger with intimate knowledge of the symbol. Meanwhile, Riley and Cameron face off.

Sarah gains strength from images of Kyle Reese, John's father, while she's hurt. Weaver attempts to save John Henry.

Sarah, John, Cameron and Derek go in search of clues connected to a factory that has been torn down. Weaver sends a man to the same place to look for survivors.

Sarah is forced to seek help from nightmares at a clinic. She tries to figure out Skynet's next move.

Cameron creates danger for all with her flaws. Riley fears her secret is out.

Jesse takes on the most important mission of her life. Sarah and John face a tough decision to leave their house.

Jesse's mission takes a turn for the worst, which results in unexpected consequences for Sarah, John, and Derek. Meanwhile, Sarah deals with Cameron and John makes a very important decision.

Sarah hides John with Charley Dixon, the only person she thinks she can trust. Meanwhile, Derek struggles to work together with Cameron, and someone compromises John Henry, putting Catherine Weaver's efforts at risk.

John is one step closer to catching Weaver while on his mission to rescue Skynet's latest target. Sarah and Ellison's reunion causes a change in their plan. Weaver discovers Ellison's secret.

The Connor's and Weaver face an epic battle that will change everyone's fortunes.