The General's Practitioner - S5-E20
Continuity mistake: Near the beginning, while Col. Bidwell is watching Hawkeye operate, in the closeups he is standing by the window but in the wide shots he is standing in a different part of the O.R. (00:04:00)
Continuity mistake: When Margaret arrives from Tokyo, BJ and Hawkeye's squashed orange disappears from the ground. (00:05:35)
Hanky Panky - S5-E18
Continuity mistake: When Hawkeye is trying to find out whether there is anything going on between BJ and nurse Donovan, a jacket behind him disappears and the other one moves to the other side of him. (00:04:00)
Continuity mistake: While Klinger is mending the movie, the amount of film on the two reels changes a lot between shots. (00:12:20)
Continuity mistake: When the chopper carrying the soldier with the wounded back takes off, the sky is cloudy and, even accounting for the poor quality of the film, the weather looks very dull. The shot changes to show Radar, Hawkeye and Margaret watching the chopper leave and it is now bright sunshine. (00:44:20)
Continuity mistake: As Hawkeye talks to the North Koren, the Korean has his hand across his lap. A second later, his arm is up, with his fingers on his temple.
Continuity mistake: After Radar calls assembly, Potter starts to address the personnel. Accounting for Hawkeye, BJ, and Margaret in Surgery, there are only thirty-three people there. In the episode "Dear Ma" (S4: Ep 17), Radar wrote that there were almost two hundred people there.
Continuity mistake: In the beginning of the episode Colonel Potter is painting a portrait of Hawkeye with his feet up, and Klinger's picture is hanging to the right of the door. But in the previous episode 'Korean surgeon' Klinger's portrait is on the left side of the door and the one of Hawkeye's is on the right side of the door, even though that portrait wasn't painted until the following episode. (00:03:15 - 00:17:55)
The Nurses - S5-E5
Continuity mistake: As The Nurses look at Baker, Walsh is keeping a lookout, then straightens up, partially turns and raises her right arm. A second later, she's back in position, and starts to straighten again.
Continuity mistake: After the movie breaks, Hawkeye is giving an over dramatic intro to Margaret. He has his left arm raised, and a second later, both hands are at chest level.
Continuity mistake: While tying a tube around Margaret's arm, Pierce drops the cotton ball with alcohol on it. A moment later, it's in his hand.
Continuity mistake: In the beginning, Colonel Potter is painting a portrait of Hawkeye. In the preceding episode, The Korean Surgeon, the painting is finished and hanging on the wall in Colonel Potter's office. It is hanging just to the left of the door. The time given is from The Korean Surgeon where you can see the painting hanging on the wall. (00:17:05)
Continuity mistake: After Radar leaves the message with Stevens for Hawkeye's friend on the Essex, it cuts to Klinger removing a nut from the jeep and he's holding the wrench with his thumb at the top, but next shot he's holding the wrench the opposite way.
Continuity mistake: As the discussion about Burns draws to a close, Potter starts to grab the files on his desk. As he says "Dismissed", he grabs them again.
Continuity mistake: From the back, Potter is facing directly at Hawkeye and BJ. From the front, he's in quarter profile, left side forward.
Continuity mistake: As BJ mentions fingernails on a chalkboard, Potter hunches his shoulders up. A second later, after the angle changes, he repeats the action.
Continuity mistake: As Hawkeye talks to the wounded man on the chopper, the speed of the rotor blades changes several times in the scene. Looking at Hawkeye, the blades are moving fast; in the reflection, much slower.
Continuity mistake: As Klinger waves his hands to get attention for his part, it can be seen they're empty. A second later, he has a bulb in his right hand.
Dear Sigmund - S5-E7
Continuity mistake: As Frank talks with Sidney, hiss right wrist is beside his knee. A second later, his right fist is on his leg.
Answer: Even an Army field hospital would have SOME weapons for self-defense if the enemy attacked. What's meant is that it's not a combat outfit, and therefore wouldn't have enough weapons to actually attack anyone. (It's also mentioned a few times that the Officer of the Watch is supposed to carry a pistol at all times, but Hawkeye refuses to do it when he's in charge and Colonels Blake and Potter don't enforce the rule).
Captain Defenestrator