Schedule conflicts with The Mighty Boosh (2003) allowed Noel Fielding to appear in only one episode in the third season. The explanation for his long-term absence was that Richmond (the character he played) got scurvy.
On the UK DVD of The IT Crowd, one of the subtitle options comes up in '1337' or 'leet' speak. 1337, based on the term 'elite', is a language of slang predominantly used by gamers and Internet users, and so fits in with the characters and general humour of The IT Crowd.
Richard Ayoade reprised his role as Moss in the American adaptation of the series. NBC ordered a full season and even began promoting the series for its 2007-2008 season. Although several episodes had been scripted, the chairman for NBC at the time Ben Silverman had the show canceled before filming began as he didn't believe in the show finding success.