My wife introduced me to these maniacs years ago, and I'm still hooked. And, as other reviewers have pointed out, this is the place to start.
DEMOLITION--This is your primer to the Young Ones. Here is where the newcomer is introduced to the characters and what makes them tick (and then explode). Musical guest: Nine Below Zero.
BOMB--So, a misdirected (maybe) nuclear bomb winds up in the boys' kitchen. Rik wants to blackmail Thatcher with it. Neil wants to defend himself against it. Mike wants to sell it to the underworld. Vyvyan, of course, wants to explode it (complete with wrecking ball). Alexei Sayle is brilliant as an arms merchant who, on the spur of the moment, decides to erupt into a fit of "Cockney Patois". Dexy's Midnight Runners do Van Morrison.
SICK--This is perhaps the most scatalogical of all of The Young Ones' episodes. After Vyv tosses a molotov cocktail (made of vodka) into Rik's room, Neil explodes into a sneezing fit that sends his snot flying. A feces smeared toilet eats a plunger. A street riot breaks out while Madness performs "Our House". Another brilliant turn by Alexei Sayle who plays Brian Damage, an escaped psycopathic killer.
This trio of episodes is not to be missed.