In many ways, this television program was an extension of the popular and long-running BBC radio program, "I'm Sorry I'll Read That Again." Not only do they share cast (Tim Brooke-Taylor, Jo Kendall, John Cleese) and ties to the Cambridge Footlights, several running gags from ISIRTA show up as jokes here. Most notably, jokes about gibbons and chartered accountants were regularly told on ISIRTA, and both are present in the first episode here.
I am a chartered accountant.
Various Characters: I am a chartered accountant, too.
Various Characters: I am also a chartered accountant.
Various Characters: And I am a go-ril-la.