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.
Radar chronicles the antics of a typical week at the 4077th, which includes Hawkeye falling for a new nurse, a POW going berserk in the OR and Klinger seeking a psychiatric discharge.
Another letter from Hawkeye to his father tells about a bigoted soldier who wants the "right color" blood, a live grenade in the OR and Henry's home movies.
A lone sniper turns the hospital compound into a combat zone, traps Henry and Radar in the showers and forces surgery by candlelight after he knocks out the generator.
The 4077th and friends convene for their weekly “Medical Conference,” A.K.A. Poker while Radar runs over a civilian and Frank is held hostage in the showers by an enlisted man.