Trivia: Early on in this episode a scene takes place in the shower between Harry Morgan and William Christopher. Right before the scene ends William pulls the chain on the lever for the shower to turn on, but the water doesn't come on; in fact when he notices the water doesn't come on, he holds onto the chain and the lever actually comes off. You can tell by his facial expressions this was totally unexpected, but since this was the end of the scene and no further dialog was needed, it was left in.
Trivia: While he was known for the role, William Christopher didn't play Father Mulcahy in the series' pilot.
Trivia: When Hawkeye is temporarily blinded, he meets a soldier, Tom Straw, whose face is covered in bandages having just been blinded in battle. He is played by Tom Sullivan, who is actually blind in real life. This is the first episode that Judy Farrell, ex-wife of Mike Farrell (B.J.), appears as Nurse Abel.
Trivia: All of the characters, based on the characters from Richard Hooker's novel, were composites of people Hooker knew, met casually, worked with, or heard about.
Trivia: In one episode, Hawkeye says to Radar, "You're a good man, Charlie Brown", a reference to the off-Broadway show of the same name based on Charles Schultz' Peanuts characters. Because the show didn't debut until 1967, this would appear to be a mistake, but it is not. The reference was intentional, an inside joke: Gary Burghoff played the title role in that play.
Trivia: After Erika tells Hawkeye that the ring is her grandmother's and she's not married, when Hawkeye joins Erika on her cot the lights flicker on and off a few times. This flickering was real and totally unscripted, and was due to a power failure on the set, but because Alan Alda and Joan Van Ark didn't miss a beat and continued with their lines the scene wasn't reshot, and they just added the PA voiceover announcing that it's the generator again.
Trivia: A real wildfire occurred at the Fox Ranch M*A*S*H outdoor set, located in Malibu Creek State Park, destroying the entire set. The fire was filmed, and the producers and writers decided to incorporate the fire in the reworked script for the series finale.