The IT Crowd Manual

The IT Crowd Manual is an hour-long 'geektastic celebration' of The IT Crowd.

Narrated by Stephen Mangan, viewers will watch classic clips (how does a fire start in Sea Parks?) and up-close-and-personal interviews with the basement-dwelling trio; Richard Ayoade, Chris O'Dowd and Katherine Parkinson.

Matt Berry, who played self-satisfied boss Douglas Reynholm, reveals how he felt taking the mantle from Chris Morris while Noel Fielding details the forbidden chemistry that his mild-mannered goth character Richmond Avenal secretly shared with Jen Barber.

Meanwhile the show's biggest fans and guest stars (Paul Whitehouse, Danny Wallace, Kevin Eldon, Frances Barber, Matthew Crosby, Boyd Hilton and Lucy Montgomery) share their top moments, which include Roy asking people (evidently from the past) if they've tried "turning it on and off again" and Denholm Reynholm's pension-related suicide.

Finally Graham Linehan, who created, wrote and directed the show, gives a guided tour of the iconic basement set that he likens to "the inside of my head and my office... a cheerful mess".

The beloved basement is, of course, packed full of nerdnip: PCs, Atari consoles, board games, comics, fangifts and, as far as Jen is concerned, it's home to 'the Internet' itself.

The documentary premiere is broadcast alongside a repeat of the special episode, Linehan's favourite episode and an episode selected via a fan vote.