The Longjohn Flap
| "The Longjohn Flap" | |
|---|---|
| M*A*S*H episode | |
| Episode no. | Season 1 Episode 19 |
| Directed by | William Wiard |
| Written by | Alan Alda |
| Production code | J319 |
| Original air date | February 18, 1973 |
"The Longjohn Flap" is the 19th episode 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.