The Longjohn Flap autobiography, "Never Have Your Dog Stuffed: and Other Things I've Learned", Alan Alda says that for this episode, he borrowed the structure from "La Ronde". "In my version, the object that's passed from couple to couple is a pair of long johns during a cold spell in the Korean winter." The Longjohn Flap "The Longjohn Flap" was episode #19 of the first season of the TV series "M*A*S*H". It originally aired on February 18, 1973 and was the first episode of "M*A*S*H" to be written by series star Alan Alda. In the middle of a cold snap, Hawkeye receives a
Things Which Have Never Yet Been Done which have never yet been tried." The episode was aired in the United States on 14 June 2014 on BBC America. It was watched by 613,000 viewers, with a Nielsen rating of 0.27 in the demographic of adults aged 18–49. Matt Brennan of "Slant Magazine" summarised the episode as being "among the best hours of television I've seen so far this year" and an example of "unrelenting brilliance". He praised the exploration of Rachel's character and especially Maslany's "nothing short of masterful" performance in the role, and described the satire of suburbia presented through Alison and Donnie as "impeccably wry".