Terminator: The Sarah Connor Chronicles - Season 1 Episode 5 -

When Sarah's friend Andy submits his computer into a chess competition, she revaluates his computer's capabilities and worries where it could all lead. During the chess match, Sarah comes face-to-face with a stranger whose history is closely tied to hers. Meanwhile at school, Cameron gets called into grief counseling and John makes a new friend in shop class. Agent Ellison discovers remnants from a terminator battle.