Richie, Potsie, Ralph (and Fonzie) have all finished high school now and the next stage of life is upon them - the army physical. The three boys receive their letters telling them when and where to report and they do so but are more than a little intimidated by the army personal who are there to put them through their paces. The shoe is on the other foot, however, when Fonzie arrives for HIS physical because he isn't quite so easily imtimidated as the younger boys.
There are some very funny moments in this one and a very amusing performance by Henry Winkler. Well worth watching.