Dissension plagues several factions in this gripping hour, as the desperate search for the all-important computer chip that could call off the military strike intensifies. As luck would have it, the chip falls into the wrong hands---people who are oblivious to its value. Meanwhile, Carrie tries to take advantage of Tony (Carlos Bernard) after he disobeys orders to abandon Jack and the chip altogether; one presidential adviser wavers as another takes a fall; and the unavailability of the vice president (Alan Dale) piques the curiosity of President Palmer, who turns to an administration veteran for an opinion. Chappelle: Paul Schulze. Aaron: Glenn Morshower.