As Bartlet prepares to speak to thousands of elementary students as the Galileo probe approaches Mars, major problems begin to pop up, including a missing F-15 fighter pilot, a fire inside a Russian nuclear missile silo, and the loss of contact with the Galileo probe. Meanwhile, Josh and Donna work together to decide whose face will appear on the newest postage stamp; and C.J. and Sam accompany Bartlet to a concert where they run awkward situations with people they've tried to avoid.