When Frank is conducting Soony's security interview, he tells Radar to stop providing information, and says "Will you put a cork in it, half pint. Unless there's a call for Philip Morris." Frank is referring to a long-time ad campaign for Philip Morris cigarettes using a diminutive man dressed as a bellboy who shouts, as if he's paging someone, "Call for Philip Mor-ris." The campaign was a play on words, suggesting that when buying cigarettes people should call out the brand name Philip Morris. The campaign apparently was successful, as it began in print ads during World War I and on radio and television continually into the 1960s, until cigarette ads were finally banned from the airwaves.
The storyline with Colonel Potter and his friend Lt. Col. Becket is repeated in the season 11 episode "Friends and Enemies."
When Cho and Sooni enter the Swamp, Hawkeye quips, "Excuse the mess. Our houseboy was drafted two years ago." This seems to be a reference to Ho-Jon and would place this episode in the latter half of 1952 or early 1953.
The first of two wedding episodes in season five, the other being the season-ending Margaret's Marriage (1977) (which was Larry Linville's last appearance in the series).