(official recap from Fox's site)
A man cleans the side of a road. He finds the head of a Terminator lying amongst the garbage. He slips it into a bag.
Sarah hopes to track down Enrique, who ten years ago, was a master of fake identification. Cameron tells Sarah that there are Resistance fighters from the future in the area. Sarah tells John to stay inside for another day.
Sarah and Cameron enter a rundown apartment. Several men are dead on the floor. They're the Resistance fighters. Cameron checks the pulse of one man; the man springs to life and throws her across the room. He's a Terminator. The two battle and fall into the alley below. The enemy robot flees and Cameron chases. Cameron is struck by a car and the Terminator escapes.
Back at home, Sarah is angry that Cameron brought them to the future, thinking it was taking away time from her to prepare her son. But Cameron reveals that Sarah would have died two years ago anyway.
Cameron tells John and Sarah that Skynet doesn't know where they are. The Terminator they battled wasn't programmed to kill John. But Cameron warns that if they find out who he is, they'll kill him. Sarah begs John to be patient. Sarah and Cameron leave to find Enrique.
In the car, Cameron reveals that Sarah would have died from cancer.
Enrique is happy to see Sarah. Sarah asks for papers, but Enrique says he has retired. He refers them to his nephew, Carlos, who continues the business.
John goes out against Sarah's wishes, and to a computer store. John searches the internet for himself and finds out about Agent Ellison. He also reads about Charlie.
The eyes of the found Terminator skull flash to life. Somewhere else in Los Angeles, a robotic fist punches through a pile of scrap metal. It's Cromartie.
Sarah and Cameron visit Carlos. When Carlos' dogs go crazy, Sarah sends Cameron outside. Carlos will do the work for twenty-thousand dollars.
A cop harasses Cameron outside. The cop goes to check the license plates of the car that Sarah drove, and Cameron begins to follow the cop with the intention of killing him. Sarah shouts to distract her. Sarah acts like she's Cameron's step mother and pulls Cameron away.
John into a house. It's Charlie's house. Charlie catches John in the kitchen, he's stunned to see John alive. Charlie wants to know what happened, but John reacts violently, and runs home.
Later, Sarah, Cameron and John sneak back into the apartment of the dead Resistance fighters. John tears down a poster to reveal a safe. Cameron touches the keypad and it electrocutes her. The Terminator from before returns and makes his way upstairs. John enters the date for Judgment Day on the keypad and opens the safe. They grab a bag inside, and then shove the Cameron out the window. Her body smashes a car. Cameron reboots, and the three run off. From behind a dark fence, an unseen man with the Resistance tattoo watches them leave.
Cromartie's body tracks down its head.
Carlos delivers Sarah's new papers. On the way out, Sarah overhears Carlos calling Enrique a "rat."
Charlie lies to his current wife about everything being okay. The knowledge of John being alive is weighing heavy on him.
Sarah wants the truth from Enrique and holds him at gunpoint. She gives him another chance to come clean and wants to know if Enrique is selling her out. He tells her about turning evidence against his cellmate. Suddenly, Cameron shoots him and says she did it because Sarah wouldn't. Sarah is furious, and begins to break down.
Cameron quizzes John on his new identity. Sarah tells John he's going to school so she'll always know where he is and who he's with.
Agent Ellison listens to a voicemail message from Enrique. It hints that he had information for Ellison. Ellison stands over Enrique's body.
John and Cameron sign up for school.
Cromarite marches through a homeless camp.
Sarah goes to the doctor for a physical, hoping to avoid cancer when it comes