Nurse Kelley has always felt rejected when it comes to the romance going on around the camp and more like one of the guys. But she is seen in a different light by Hawkeye when she comforts a dying soldier.
While administering last rights to a soldier, Father Mulcahy notices the man is still alive. Meanwhile, the camp tells stories of supernatural experiences while celebrating Halloween.
The Army tries to get a Korean pilot to defect as PR, but are shocked when no one takes up their offer. Meanwhile, Charles falls for a French nurse but is disappointed when he learns of her past lifestyle.
Hawkeye becomes paranoid when BJ vows to pull the greatest practical joke on him, as good ol' Trapper John used to do.
Hawkeye is given the duty of reading a eulogy for a nurse that no one really knew too much about, after she dies in a water tower accident in camp. Later, he is shocked to read from her journal that she had deep feelings for Hawkeye.
To boost the wounded soldiers moral, Hawkeye and Charles announce that there is a rumor that Marilyn Monroe is coming to the 4077th to say thanks for treating her wounded cousin. As the news gets out of hand, B.J. takes full responsibility when he was unable to rescue a wounded soldier he found while returning from a fishing trip.
The crew hold a mortgage burning party for Colonel Potter after Hawkeye receives the good news from Mrs. Potter in a letter.
Hawkeye and B.J. go to no ends to bring a new, racy movie to the camp that had been banned in Boston, called "The Moon Is Blue" as a means to boost morale during a heatwave.
Father Mulcahy is asked to make the 4077th proud when Colonel Potter makes a bet against the 8063rd in a running race, who then pull a fast one by bringing in an Olympic marathoner for the competition.
A visit from some U.N. dignitaries to the 4077th leave a lasting impression on a few atthe camp
Hawkeye and B.J. are suffering from restless nights due to Charles' snoring, a condition of which makes him question whether he is a true, Winchester. Meanwhile, Colonel Potter discovers that his visiting son-in-law had an affair in Tokyo.
Margaret loses her voice as she is about to meet Dr. Chesler, a personal hero of hers. Meanwhile, a visiting Colonel continues planning military strategy, even as his own wounded son is laying in a bed at the 4077th.
Colonel Potter is torn between friendship and doing what is right when the doctors discover that his old friend, Colonel Woody Cooke, froze while the enemy attacked his platoon he was leading, causing unnecessary casualties.
A soldier learns a heartbreaking lesson after he makes a friendship with a GI he had wounded. Meanwhile, Charles will do anything to avoid taking part as the Charity Officer.
Margaret and Hawkeye help collect items for a camp time capsule. Also, B.J. gets revenge with the help of a fake grenade, and Klinger falls in love with a young Korean woman who is suspected as being a spy.
The final days have finally arrived for the 4077th. In the passing days we find Charles as a conductor for a musical group of Chinese prisoners, B.J. wishing to make it home in time for Erin's birthday and Margaret trying to find a glamorous Army post. But tragedy also befalls some of the group as Hawkeye battles his war memories after an incident aboard a bus, Father Mulcahy loses his hearing from an explosion and Klinger's fiancee can't find her family members. As the camp closes its doors forever, each member tells their plans for the future and say their final goodbyes.