"Previously on the West Wing" spoken by C.J. After a foreign terrorist is caught at the border with explosives, President Bartlet (Martin Sheen) ponders the impact of ordering a heightened security alert for the nation's airports. Toby (Richard Schiff) is shocked to uncover the President's secret affliction with multiple sclerosis -- and he details its political and legal ramifications in an intense discussion with Bartlet and Leo (John Spencer).