Creator Graham Linehan appealed to fans for old computers to 'litter the main set' in the third season. The Centre for Computing History took this request to the extreme and offered a collection of computers from the 1970s and 1980s. They included an Altair 8800, Oric Atmos, Amstrad CPC 464, Sinclair ZX81, Sinclair ZX Spectrum +2, Commodore 64, Commodore PET, Atari ST, Sord M5, Acorn RISC PC600, BBC Model B, an Astro Wars game and circuit boards from a Wang VS mainframe.
Roy's T-shirt is a Venn diagram with legend 'music I like' and 'music you like' overlapping to give 'music I used to like'.
The near-death scene where Douglas sees his father Denholm in the afterlife contains the only moment in the series where the two are on screen together.
When Douglas asks Moss to call an ambulance, Moss briefly starts to sing the new, absurdly long emergency services number from "Calamity Jen" (2006).