All Series
2012 Specials (2012)
As part of a special evening of programming in which a number of Channel 4's most popular programmes crossed into each others' territories, Jimmy Carr hosted an edition of cerebral quiz show Countdown, with Sean Lock and Jon Richardson playing the game. No one realised back then that it'd spawn this long-running show.
2013 Specials (2013)
Jimmy Carr, Jon Richardson and Sean Lock hijacked an episode of Deal or No Deal for the Channel 4 Mash Up 2013, before returning to more games of Countdown.
Series 1 (2013)
The first full series of comically-charged editions of the words and numbers game, for summer 2013, including an 80s special.
Series 2 (2014)
Guests in this series included Rhod Gilbert, Kevin Bridges, Sharon Horgan and James Corden.
Series 3 (2014)
Guests included Jonathan Ross, Bill Bailey, Jo Brand, Jason Manford and Stephen Mangan.
Series 4 (2014)
The boys return for a further 3 episodes during September 2014, and a Christmas special.
Series 6 (2015)
The longest series yet. Joe Wilkinson was missing for this series. Jon Richardson also missed many episodes, so many of the shows feature guest team captains.
Series 9 (2016)
Guests in this series include David Mitchell, Richard Ayoade, Katherine Ryan, Roisin Conaty, Victoria Coren-Mitchell, David O'Doherty, Nish Kumar, Henning Wehn, Adam Buxton, Natasia Demetriou, and John Kearns.
Series 15 (2018)
Katherine Ryan hosts a special all-female edition of the show to begin this series.
