Sarah and Cameron take it upon themselves to investigate a nuclear power plant. John becomes less enthusiastic about academics, but flourishes socially with the help of a new friend. Meanwhile, Catherine Weaver gains another piece of the puzzle for her pet project.

Software glitch causes Cameron to forget who she is. She goes missing from the Connors and is taken in by a street kid named Jody. Cameron and Jody end up at a halfway house where Cameron meets with a social worker who uncovers some of Cameron's distant memories. Meanwhile, Catherine Weaver meets with Agent Ellison to discuss his future at Zeira Corp, and Ellison does some digging into Weaver's past.