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Lenny Henry is the first of four celebrities taking viewers on a guided tour of all things Channel 4. He examines how Mary Whitehouse was decrying blasphemy in Brookside within a week of the channel's launch, and looks at the success of Countdown. Cameras also focus on cult live music strand The Tube, and hit shows Whose Line Is It Anyway, and The Comic Strip Presents.

The comedian examines Channel 4 in the 1990s and the heady days of late-night fixture The Word and early morning sensation The Big Breakfast, with the whirlwind that was Chris Evans. The station's output included comedes Father Ted, Brass Eye and Drop the Dead Donkey, and viewers were introduced to future stars Ricky Gervais, Sacha Baron Cohen, Simon Pegg and Dermot O'Leary.

The Big Brother presenter looks back on a decade of Channel 4 programmes, sharing a first-hand perspective on the dawn of the groundbreaking reality show. Davina reveals how shows from You Are What You Eat and How to Look Good Naked also reflected a fascination with the details of other people's lives, as well as celebrating dramas like Skins, Teachers and Sugar Rush and flagship favourites Come Dine with Me, Coach Trip and Embarrassing Bodies.

The comedian Jimmy Carr looks back on a decade of Channel 4 programmes from 2010 to the present day, a period when the channel became the go-to destination for the realest of reality television, as well as envelope-pushing drama, entertainment and comedy. Featured programmes include One Born Every Minute, 24 Hours in Police Custody, Chewing Gum, Catastrophe and First Dates.