As You Were - S2-E20
Revealing mistake: At the end, in the shot of Klinger singing while he's sewing a dress on his White Rotary sewing machine, as he's guiding the fabric forward it isn't actually under the machine's presser foot, which it needs to be in order to be stitched by the needle.
As You Were - S2-E20
Continuity mistake: When Klinger's in Father Mulcahy's tent he pulls up a chair and when he sits down he places his purse on his lap, but in the closeup the purse strap is now around his left arm.
As You Were - S2-E20
Revealing mistake: As Henry goes over to the expectant mother, a round takes out the generator. After the lights go out, there is a blue light outside the window, and also blue lights over the action. They can be seen in the reflections on the light sets over the tables.
Continuity mistake: While Trapper and Hawkeye are lying on their cots, one by one everyone joins them in the Swamp, and in Trapper's closeups the "USA sterilized" that's printed on his pillow is upside down, but in the wideshots his pillow's flipped over with the print right-side up.
Visible crew/equipment: Before the meeting in Henry's office starts, when Margaret and Frank take their seats, under Frank's chair we can see the chalk T-mark on the floor behind him.
Continuity mistake: When in the Swamp, and they show Hawkeye numerous times, the door to the stove is open, then closed, then open, etc.
Revealing mistake: There is a lag between the interior lights going out and the exterior stage lights going on.
Factual error: In surgery Trapper John is singing Frank Sinatra's version of "I got you under my skin". Although it was written in 1936, Sinatra did not release it until 1956, after the Korean War ended. The 1936 version sung by Al Bowlly sounds nothing like the version Trapper John was singing, which was mimicking Sinatra's version.
Suggested correction: While it hadn't been released on vinyl until 1956, Sinatra had sung the song as early as 1946 on his radio show and during live shows.
The version Frank Sinatra sang on his radio show was similar to the original version used in the movie "Born to Dance" (a movie he references before singing his two songs). He didn't change it to the big band version that Trapper imitates until 1956.
Continuity mistake: When Frank walks into the Swamp and puts down the typewriter, in shots facing Frank the manila envelope's open flap faces up, but in shots facing Trapper and Hawkeye while they're pretending to argue the envelope is flipped over with the flap facing down, then when Frank walks back to the envelope the flap faces up.
Continuity mistake: While Hawkeye and Trapper are playing shotglass checkers Frank lathers shaving cream onto his face, but in his closeups the thick foam is dried out.
Revealing mistake: When the mail arrives in the compound, in daylight, everyone has 3 shadows. (00:00:50)
Visible crew/equipment: After Hawkeye and Trapper tell Frank that they made up Pioneer Aviation to help him look foolish, when Hawkeye picks up Trapper's duffel bag, as the shot pulls back the chalk T-mark can be seen on the floor where Hawkeye had been standing.
The General Flipped at Dawn - S3-E1
Visible crew/equipment: After Hawkeye disobeys General Steele's orders, when it cuts to the preliminary hearing in the mess tent, the chalk T-mark can be seen on the floor under the bench at the chopper pilot's feet, where he will stand in a moment.
The General Flipped at Dawn - S3-E1
Continuity mistake: As the chopper lands on the pad, and the ambulance comes up, the pilot is as two different men when Hawkeye and Trapper approach and arrive at the chopper, meaning the landing was stock footage.
Revealing mistake: As the first chopper lands on the pad, you can see that the pilot is Cowboy, a clear reuse of the shot from the episode "Cowboy"
Visible crew/equipment: As The Bus nears Rainbow Bridge, there is a reflection of either the camera vehicle or equipment in the lower right side of the windshield.
Continuity mistake: Hawkeye is in the Swamp talking with Trapper. Hawkeye leaves and walks past the tent - Trapper is not inside. (00:07:30)
Continuity mistake: When Radar is going to bed, he takes his shirt off and his upper body is naked. When he puts the blanket over his teddy bear you can see sleeves. Next shot, he is naked again.
Continuity mistake: In the office, Radar is getting ready for bed, and has taken off his shirt. When he goes to tuck in his Teddy, he suddenly has sleeves.