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In the third and final entry in M*A*S*H unofficial "mail call" trilogy, the army postman delivers a passel of problems to the 4077th. Klinger (Jamie Farr) learns that his wife wants a divorce; B.J.'s (Mike Farrell) spouse Peggy reveals that she's been "hit upon" by another man; and Radar (Gary Burghoff) copes with the prospect of his mother's remarriage. Only Hawkeye (Alan Alda) is the recipient of unqualified "good news", a bundle of love letters; trouble is, they aren't written to him.