Susie Dent

One of TV's most unlikely - but no less enjoyable for that - cross-fertilisations returns as the 8 out of 10 Cats comedy quiz team takes over (for the third time) the veteran words and numbers game Countdown. Once again, Jimmy Carr replaces Nick Hewer in the presenter's chair, while Jon Richardson is joined by Rhod Gilbert to take on fellow comedians Lee Mack (replacing absent captain Sean Lock) and Rob Beckett. In Dictionary Corner with Countdown's Susie Dent is performance poet Tim Key, while Rachel Riley gets less welcome assistance from beardy Joe Wilkinson.

Following the success of last year's special, and as part of Funny Fortnight, Jimmy Carr is back hosting a rematch of Channel 4's MashUp, in which 8 Out of 10 Cats fuses with Countdown. Sean Lock and Jon Richardson face off as team captains, Irish comic David O'Doherty joins Susie Dent in Dictionary Corner and comedian Joe Wilkinson helps out boffin babe Rachel Riley on the numbers.