On this year's "Big Block of Cheese Day", a college friend of Donna's asks Sam to help her get her late grandfather, accused of being a Communist spy inside the U.S. government, a presidential pardon; dealing with the recent revelation that his father had been having an affair for the past 27 years, Sam faces off with an F.B.I. agent, and later with Nancy McNally, over the pardon. Elsewhere, a group of cartographers completely re-educates C.J. on her perception of the globe, and one-time protester Toby, with the help of a straight-talking female security guard, speaks for the w.h. at a rally to protest against U.S. participation in the WTO and various free trade agreements.