Synopsis by Hal Erickson
The weekly mail call affords Hawkeye (Alan Alda) the opportunity to concoct an elaborate practical joke involving the greedy, gullible Frank Burns (Larry Linville) and a nonexistant blue-chip stock called Pioneer Aviation. But the latest mail has an entirely different effect on Trapper (Wayne Rogers), who becomes so depressed that he threatens to desert the camp. This episode marked the directorial debut of series regular Alan Alda. "Mail Call" first aired on February 23, 1974.