The 4077th deals with a sudden heat wave in their own personal ways: Klinger disassembles the P.A. system, Charles goes through all of his tax returns and bonds, B.J. stresses over a letter from Peg, Margaret develops a severe case of prickly heat, and Colonel Potter can't get a good night's sleep.

Hawkeye's challenge to go through a day without telling a joke is complicated by Winchester's amusingly desperate attempt to curry the favor of a hated visiting officer.