About this MASH episode:
MASH - "The Longjohn Flap" is the 19th episode of season one and it originally aired on February 18, 1973.
In the middle of a cold snap, Hawkeye receives a pair of longjohns from home. Hawkeye gives them to an ill Trapper out of sympathy and Trapper loses them to Radar in a poker game. The longjohns proceed to pass through the hands of almost everyone in the camp: Radar gives them to the cook in exchange for a whole lamb roast with mint jelly, and the cook bribes Frank with them to avoid being demoted because of the unsanitary conditions of the kitchen. Frank gives the longjohns to an intimidating Margaret as a sign of devotion to her, before Klinger steals the longjohns from Margaret's tent. A remorseful Klinger then gives the longjohns to Father Mulcahy, who in turn gives them to Henry (but not until after he spends the night wearing them). Henry claims he will return the longjohns to their rightful owner, but gets caught putting them on by Hawkeye and Trapper. Henry rebuffs Hawkeye's demand that the longjohns be returned, but later gives them back to Hawkeye in gratitude for saving his life via an appendectomy.