Attention, all personnel. Please check the supply room for penicillin and the following tropes. There may be some missing.
Amusing Injuries: The lengths Flagg goes to to make it look like Perkins fought and overpowered him and then escaped involved breaking a telephone receive over his head and charging headfirst into a closet.
Armor-Piercing Question: Frank maintains that buying penicillin from the black market is illegal. Hawkeye asks him what's worse, buying from the black market or waging a war.
Both Sides Have a Point: In a way, both Flagg and the 4077th's different needs for penicillin are capable of saving lives.
Flagg: My people need it for barter. They're desperate for it up North, so we use it to buy information.
Hawkeye: We use it to save lives.
Flagg: If I get information that'll end a battle sooner and information that will avoid an ambush, I'll save more lives than you will.
Broken Pedestal: Happens briefly with Margaret when she learns Colonel Flagg was caught trying to steal penicillin.
Upon discovering Corporal Perkins is a stolen identity, Colonel Flagg wonders who the man could be. Henry lamely suggests he could be Perkins in the CIA. Flagg retorts against it because he's Perkins in the CIA. This is not the first time the name Perkins has been used as a gag when Colonel Flagg's around.
Conveniently Timed Distraction: An armed Perkins is holding most of the main cast at bay with a rifle, unknowingly backing himself toward Father Mulcahy's tent. When the chaplain emerges to investigate the commotion, Perkins instinctually turns toward him. His back now to the others, he is taken down and restrained by Klinger.
Deadpan Snarker: After Margaret realises too late that Hawkeye and Trapper have caught onto her attraction to Flagg, she makes up the lie that she was just checking his ribs for damage. Hawkeye simply asks if she would like to order some sauce to go with it.
Defiant to the End: Hawkeye and Trapper try to get answers out of Perkins as they tend to his injuries. He remains (mostly) quiet.
Dirty Coward: When Perkins is holding all of them at riflepoint, Margaret accuses Henry, Trapper and Hawkeye of being this instead of charging forward to take Perkins. Knowing how reckless that is, Hawkeye snarks quietly at her.
Green-Eyed Monster: Frank gets jealous of the attraction Margaret holds for Colonel Flagg.
Implied Death Threat: When Radar sticks up for Colonel Blake, Flagg orders him to be quiet or he'll use him to clean a cannon.
Irony: Father Mulcahy is heard giving thanks to God for getting the people of MASH 4077 through another day without too much trouble, just as the thieves are sneaking behind his tent.
Mass "Oh, Crap!": Perkins is trying to escape after being seen by Klinger, but is pursued by Henry Blake and cornered and held at riflepoint by Klinger. Then he snatches the rifle from Klinger and points it at the two of them. The noise the situation created leads the rest of the main cast to investigate.
Klinger is adamant that he cannot let Henry pass since the colonel did not give him the correct password. This drives Henry to fury and he threatens to make sure Klinger's stay in the army will last a whole lot longer if he's not allowed through. Given the fact Klinger is trying to get out of the army, he caves.
Henry: If I don't get to the latrine, something will happen that hasn't happened since I was six. If that happens, you'll be in the army until you're a little old whatever-you-are in correction shoes and support stockings. Now blow!
Henry gets the dangerous feeling that Colonel Flagg may be more crazy and malevolent than he has been before.
Overly Long Gag: The thieves sneak behind a total of four tents and overhear, in order, Father Mulcahy uttering a prayer of thanks, Hawkeye and an unnamed nurse on a date, Trapper asking his date when her roommate (Hawkeye's date) would be getting back, and finally another date between Frank and Margaret. By the end of the gag, Perkins rolls his eyes.
Wham Line: Hawkeye suspects Perkins and his gang of thieves of trying to steal the penicillin so they could sell it on the black market. Remaining silent up until that point, Perkins quietly refutes the accusation.
Henry: He's a superior psycho. His head's so twisted he's gotta screw his cap on.
White and Grey Morality: Perkins and his friends have been stealing penicillin from the 4077 and other medical units because the Army won't supply the frontline medical stations with the required amount of the drug.