Jimmy Carr hosts the Cats/Countdown mash-up, with Sean Lock, Jon Richardson, Bob Mortimer and Richard Osman. Matthew Crosby joins Susie Dent in Dictionary Corner, and Joe Wilkinson 'helps' Rachel.

Jimmy Carr
Self - Presenter

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Jon Richardson
Self

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Sean Lock
Self

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Rachel Riley
Self

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Susie Dent
Self

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Joe Wilkinson
Himself

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Robert Deaton
Fabio

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Guest stars