These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Green Clarinet forces you to reveal a shameful secret... to the tune of "I Saw Three Ships".
Genius Bonus: One The Quiz Broadcast sketch has the Test Card Girl writing "Revelation 6 13 15" on the blackboard.
Revelation 6:13-15 reads: "and the stars in the sky fell to earth, as late figs drop from a fig tree when shaken by a strong wind. The sky receded like a scroll, rolling up, and every mountain and island was removed from its place.
Then the kings of the earth, the princes, the generals, the rich, the mighty, and every slave and every free man hid in caves and among the rocks of the mountains."
Also, during the Cheesoid sketch, about an expert soup chef who loses his sense of smell. The chef has his copy of Perfume stolen, a book about a character with an overwhelming obsession with the sense of smell.
One of the Didldidi supermarket ads says that some of the bargains were due to stock having to be sold off before changes to the Trade Descriptions Act came into force. It sounds like they're making up an excuse for Rule of Funny, but the Trade Descriptions Act really was completely overhauled around that time.
Harsher in Hindsight: Angel Summoner and BMX Bandit, about a duo of superheroes with vastly different power levels and the tension this creates, is a rather apt metaphor for Mitchell (Angel Summoner) and Webb's (BMX Bandit) later careers.
BMX Bandit: Your ability summon a horde of celestial superbeings at will is making my BMX skills a bit...redundant.
The Orphaned Punchline about Jimmy Savile receiving three life sentences. "You think you know a guy, and then..." Although, considering that it was allegedly an open secret at the BBC, it may simply have been a deliberate (if slightly sick) In-Joke that "got out".
The Dead British Actors sketch (in which two feuding actors play Holmes and Watson, by alternating roles each night) is hilarious now given Danny Boyle's stage production of Frankenstein has the same setup between Victor and the Creature.