"Five o'Clock Charlie"
The story of a hapless North Korean pilot who attempts to bomb an ammo dump set up next to the camp - every day at exactly 1700 hours. His punctuality is dampened by his ineptitude and his barely-running airplane. The camp starts betting on how far he's off, which provides a measure of levity. Frank convinces General Hammond to send the camp an antiaircraft gun and forms a gun crew; Frank turns out to be as bad at gunnery as he is at everything else around here. Five o'Clock Charlie ends his daily missions after Frank blows up the ammo dump himself.
"The Army-Navy Game"
During the annual Army-Navy Game a bomb is dropped on the camp. No one will tell them how to disarm it because everyone who knows how is listening to the game on Armed Forces Radio. Hawkeye and Trapper attempt to disarm it, accidentally set it off and discover it's a CIA propaganda bomb.
"Fade Out, Fade In"
A two-part episode, it introduces Charles as Frank's replacement. While Charles' assimilation into the unit and a small subplot about a Walter Mitty-like private convincing Klinger he's a lawyer who can get him his long-desired Section 8, what makes this one special is the Military Police desk sergeant in Tokyo calling Colonel Potter to describe the depravity a drunken Frank is inflicting on the innocent.
"Rally Round the Flagg, Boys"
An American patient gets pissed with Hawkeye that Hawkeye treated a severely wounded North Korean soldier before his relatively minor wounds were cared for and reports Hawkeye for disloyalty. Colonel Flagg. the most incompetent intelligence officer this country has ever created, offers Charles a transfer to Fort Devens, MA - a real-world Army base less than 40 miles from the Winchester estate in the Beacon Hill neighborhood of Boston - in exchange for providing dirt on Hawkeye that will finally allow Colonel Flagg to haul him off. Charles tells Flagg he has information about a "spy meeting"; Flagg raids it to discover it's a bridge game involving Colonel Potter, Hawkeye, and the mayor and police chief of Uijongbu. When questioned by Colonel Potter, Charles delights the foursome by telling them he did it to make Flagg look like an idiot.
"Blood Brothers"
One of the more somber episodes of M*A*S*H, Father Mulcahy is informed by Colonel Potter that the Catholic cardinal who's his boss is going to visit the camp in two days' time. Mulcahy becomes a fatherzilla and starts making life hell for the rest of the camp, thinking the cardinal will rip him apart if he sees anything less-than-spiritual in the unit. As it turns out the cardinal is a really nice person. In Post-Op a Private Sturgis, played by Patrick Swayze, and his battle buddy are both recovering from surgery. Sturgis offers to donate a pint of blood for his buddy; during the testing needed to be sure the blood was okay to give his buddy Hawkeye discovers Sturgis has leukemia. Hawkeye finally tells Sturgis he has cancer, which has the expected impact on Sturgis. While Hawkeye was sitting in the mess tent thinking about what he had done, Father Mulcahy comes in screaming about how no one's cooperating with his edicts only to be informed Hawkeye wasn't concerned about Mulcahy's perceived problems as he just had to tell a patient he has a fatal disease. Mulcahy spends the night talking to Sturgis, which was only interrupted by being reminded he had to perform a service. Mulcahy gives a powerful sermon in which he apologized to the unit for being an asshole the last couple of days while dressed in his brown bathrobe and looking like he hadn't slept all night - which he hadn't. At the end of the show the cardinal praises the work Father Mulcahy is doing and tells him to keep it up. In real life Patrick Swayze died of cancer, but a different variety than he had in this episode.