Feeling blue, Sidney Freedman, the camp's favorite psychiatrist, pays a visit and writes a letter to Sigmund Freud.
The final episode of the series which was set in Korea during the war there in the early '50s, follows the antics of the medical staff of the 4077th M*A*S*H, or mobile Army surgical hospital.
A congressional aide falsely suspects that Margaret is a communist sympathizer, but Klinger gets some real dirt on the visitor.
Colonel Potter and a friend play a sophisticated April Fool's Day joke on the doctors.
One of Colonel Potter's friends displays incompetence on the battlefield.