Sarah visits Miles Dyson's widow to find the creator of Skynet. She leads her to a man named Andy Goode who used to work with Dyson and is building a chess-playing computer named "The Turk." John and Cameron try their best to fit in on their first day at a new high school.

Sarah reevaluates the capabilities of her friend Andy's computer after he enters it in a chess competition. During the competition Sarah meets a stranger with a history similar to hers. Meanwhile, Agent Ellison finds remnants from a past terminator battle.

Derek finds the brain chip from Vick that Cameron had kept. John builds an interface for it and they discover a computerized traffic system is important to Skynet. Sarah decides it must be sabotaged. Meanwhile, Cromartie is checking through school records in search of John.