The 4077th Mobile Army Surgical Hospital is stuck in the middle of the Korean war. With little help from the circumstances they find themselves in, they are forced to make their own fun. Fond of practical jokes and revenge, the doctors, nurses, administrators, and soldiers often find ways of making wartime life bearable.
B.J. and Hawkeye resolve to clear Klinger's name after he chooses Winchester to defend him at his military court-martial.
Newscaster Clete Roberts, reprising an earlier interview appearance, returns to update Korean War conditions, when he conducts a series of television talks with the leading characters of the 4077th.
The military police think they've solved a rash of thefts at the 4077th when they apprehend Klinger with Hawkeye's stolen camera.
A United Nations delegation tours the 4077th - a Swede, a Hindu, and a British officer - and each leaves a lasting effect on the men and women of the camp.
Hawkeye volunteers to deliver the eulogy for a dead nurse that he briefly dated, and belatedly discovers her deep feelings for him.
Hawkeye is the golden boy of the world press when he treats a celebrity prizefighter, 'Gentleman' Joe Cavanaugh, who has a stroke at the 4077th. Father Mulcahy finds the news hard to take, as Cavanaugh was a hero of his.
Whilst suffering a fever, Klinger communicates with the spirit of a dead soldier, Private Weston, who stays on to witness his own last rites.
A touring USO show brings an unexpected touch of vaudeville to the 4077th when the star showgirl requires an emergency operation. And wouldn't you know, the comedian is Klinger's hero!
B.J. almost becomes the surrogate father to a Korean family. Finding them a substitute for his own absent family, B.J. spends so much time with them that his medical efficiency begins to suffer, and Hawkeye worries about his health. B.J.: "First they take me from my wife and kid, and just when I find something to help fill the gap, they take that away, too."
Hawkeye is injured in a jeep accident and, aware he has a concussion, babbles to a Korean family to keep himself awake.
After losing to the Marines once again, Colonel Potter wishes there was one sport the 4077th were any good at. When Klinger mentions he can bowl, the Colonel decides to have a bowling competition. Unfortunately, he and Klinger are the only 2 good bowlers in the camp, so BJ and Father Mulcahy are "recruited" to the team. Colonel Potter becomes obsessed with winning the game, and excludes Margaret from the team because she helped the team lose at softball. Then the 4077th team hear the Marines have got a "ringer" in their team after pulling some strings..... Meanwhile, Hawkeye finds out his father is in hospital and tries to speak to him over the phone, watched by Charles, who envies Hawkeye's close relationship with his father.
Hawkeye writes a heartfelt letter to President Harry Truman to protest at the continued fighting in Korea. Meanwhile, Colonel Ditka has promised a much-needed water-heater if the 4077th beautifies the camp.
Tired of reminders about Trapper John's skill as a practical joker, B.J. bets Hawkeye he can prank everyone present.
Potter's attempts to assemble the crew for a family portrait are thwarted by a feud between bunkmates Pierce, Hunnicutt, and Winchester. Things are not helped by the efforts of Margaret, Klinger and Mulcahy to bring the Swampmen back together.
Winchester, Pierce, and Hunnicutt find themselves in the sticky position of having to decide which enlisted men to recommend for promotion. For Winchester it could be a matter of life and death.
The Army tries to get a North Korean pilot to defect, and Charles gets a rude shock when he falls for a French nurse with a Bohemian past.
Winchester infuriates the camp when he hoards his stateside newspapers, and Hawkeye reunites two Korean brothers who have been fighting on opposite sides of the war.
Hawkeye is outraged when a sensationalistic war correspondent, Clayton Kibbee, reports irresponsible G.I. stunts as tales of military valor. Kibbee: "As for the last two pints of blood, there's no big finale, no heroes. They helped an old soldier, who'd had visions of glory but finally got it through his thick head how tragic and inhumane war can be. Maybe he'll know better next time."
Klinger buys a goat, with the intention of getting rich by selling it's milk. Then the goat eats the 4077th's $22,340 payroll, leaving paymaster Hawkeye holding the bag. Meanwhile, Charles also thinks he can make a killing when he sees an ancient vase.
Potter sends for Sidney Freedman when he loses confidence in his surgical abilities, and Winchester loses patience with his bunkmates' sloppiness.
On his way to some R&R in Tokyo, a North Korean soldier forces Hawkeye to perform an emergency roadside operation on his buddy.
Hawkeye is reunited with a woman he thought was out of his life forever, but who never altogether leaves.
Irritated that the 4077th is planning a "surprise" party for him, Hawkeye volunteers to go to the aid of a wounded surgeon at the front. An additional irritant to Hawkeye is the arrival of Dr. Borelli, a wisecracking medical advisor with whom he habitually disagrees.
Father Mulcahy counsels a GI who is plagued by guilt because he has swapped tags with a dead colleague. Meanwhile, B.J. and Charles consider ways of keeping a soldier-salesman quiet.
The arrival of a wounded Korean woman sparks a conflict at the 4077th: Hawkeye wants to heal her, but a steely ROK officer, Lt. Park, is more anxious to "question" her about alleged guerilla activities.