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

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 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?

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 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).

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.