Continuity: At one time, Col. Potter talks about how his daughter is an only child. In a different episode, he mentions that his son's wife is having a baby.

Continuity: In the first season of M*A*S*H, Hawkeye mentions that his father lives in Vermont, in the later seasons his father lives in Crab Apple Cove, Maine and has never left there in 30 years.

Continuity: In the episode "Change of Command", Potter asks Mulcahy if he "can do Methodist". In the episode "Period of Adjustment", Potter asks Mulcahy "You wouldn't lie to a Presbyterian, would you?" Just what denomination *is* Potter?

Continuity: In the first episodes, Col. Blake's wife is named Mildred, later her name is changed to Lorraine. (In case of confusion, when Col. Potter came to the 4077th, his wife was also named Mildred, but that's not relevant).

Revealing: In the opening title sequence the two helicopters go in front of the mountain. If you watch the lead helicopter very carefully when it first goes in front of the mountain it disappears for a split second and reappears.

Continuity: In an early episode Hawkeye receives a sweater knitted by his sister. Subsequently in the show he has always been an only child.

Deliberate "mistake": These errors I assume were caused by the show running 3 times longer than the real war. Col. Potter arrived at MASH in September 1952 a year before the war ended, then a few months passed by Margaret got engaged for 8 months, then Frank Burns left and Charles took his place. In this time the war would have ended. In the final episode Margaret mentions Charles has been there for 2 years. Which means he would have arrived in 1951 a year before Trapper and Henry left and Col. Potter arrived. It's a lot to take in.

Continuity: In the episode "It Happened One Night", Klinger has B Positive blood type. In the episode "C*A*V*E*", Klinger has AB Negative blood type. Blood types *never* change.

Continuity: When Hawkeye and Trapper are arrested by Hammond at the party there is a large crowd of people behind the General and Henry. When we cut to the shot of Margaret and Frank approaching, there is no-one in sight.

Continuity: In the pilot episode when Hawkeye and Trapper are going to send Ho Jon to the states to go to medical school, Hawkeye says Ho Jon can stay with his parents, but throughout the rest of the series Hawkeye's father is a widower.

Continuity: The bag used by Trapper for training is marked "Property of MAJ. Frank W. Burns". However, later in the series Frank's middle name is revealed to be Marion.

Continuity: In the first shot of Trapper running behind the jeep, he has a large patch of sweat on his chest. For the rest of the scene it is dry.

Other: At the end of the show Trapper has a steak over his eye covering the black eye he received. Throughout the series the characters constantly complained about the food yet they have the audacity to waste a perfectly good steak.

Continuity: As Henry is receiving his medal, Hawkeye walks up and stands close behind a man who is standing up and two women who are sitting down. The camera angle switches to show Hawkeye talking to Trapper and now they are standing behind two standing women.

Continuity: Radar hangs the hammer on the "Out of Order" sign and it is covering the 'of'. When he and Frank walk away the hammer has moved and is covering the 't'

Continuity: When you see the shadow of the helicopter on the ground, there is no shadow of Hawkeye who is supposedly standing in the door getting ready to be lowered to the ground.

Continuity: As Hawkeye and Eddie are going to sit down for lunch, on the table is ketchup, a bowl, pepper and salt. The shot switches to them sat down and the order is now bowl, ketchup, salt and pepper.

Continuity: After doing his pushups, Colonel Brighton puts on a red robe and talks with Trapper and Hawkeye. In some shots the cord from the robe's hood is hanging down and in others it is tucked in.

Continuity: In this episode we see Radar outside Col. Brighton's tent with a glass of milk to slip into the tent. Before he does, the camera switches to inside the tent and if you look at the bottom left corner of the screen you'll see the milk is already there before Radar slips it in.

Continuity: When Radar is slipping the glass of milk into Buzz's tent, we see the outside of the tent and there are no windows. From the inside, the milk is placed on a table that is right under a window.