"iMacGuffin: Portable Infotech and Suspense Cinema." (Complete four-part essay.) The term "MacGuffin" describes a spy film's motivating object. Spies are usually seeking information, and the onscreen MacGuffins that contain vital data have changed with the times, from microfilm to tape to removable PC media. This is the full version of a four-part video essay by Jefferson Robbins, produced for FilmFreakCentral.net. This is a work of education and criticism; no challenge to copyrights is implied.