Jimmy Carr hosts, as Roisin Conaty and Asim Chaudhry take on Jon Richardson and Josh Widdicombe. Bill Bailey is in Dictionary Corner. Regular Countdown mathematician Rachel Riley and lexicographer Susie Dent are on hand to adjudicate

Jimmy Carr
Self - Presenter

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Jon Richardson
Self

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Rachel Riley
Self

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Susie Dent
Self

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Robert Deaton
Fabio

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Guest stars