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- Writers: Robert Cochran, Joel Surnow
- Stars: Kiefer Sutherland, Mary Lynn Rajskub, Carlos Bernard, Dennis Haysbert
When she's captured by Jack and Chase, Nina unleashes a self repeating worm in CTU's computer system that cuts off inter-agency connectivity and endangers undercover CTU operatives around the world. Sherry runs out of options and decides to break into Alan Milliken's house and steal his cell phone in order to get incriminating evidence.