01. Miles Jupp, Rose Matafeo, Vic Reeves
Sean Lock and Miles Jupp take on Jon Richardson and Rose Matafeo, while Vic Reeves joins Susie Dent in Dictionary Corner. Hosted by Jimmy Carr, with regular Countdown mathematician Rachel Riley looking after the numbers and letters.
02. Victoria Coren Mitchell, James Acaster, Morgana Robinson
Sean Lock and Victoria Coren Mitchell take on Jon Richardson and James Acaster in the classic panel game. Morgana Robinson joins Susie Dent in Dictionary Corner, with Rachel Riley.
03. Joe Wilkinson, Sara Pascoe, Sam Simmons
Sean Lock and Joe Wilkinson take on Jon Richardson and Sara Pascoe. Sam Simmons is in Dictionary Corner, while maths whizz Rachel Riley looks after the letters and numbers.
04. Rob Beckett, Alan Carr, Sarah Millican, Nick Mohammed
Sean Lock and Rob Beckett take on special guest team captains Alan Carr and Sarah Millican. Nick Mohammed joins Susie Dent is in Dictionary Corner, while maths whizz Rachel Riley looks after the letters and numbers.
05. Sara Pascoe, Alan Carr, Tom Allen, Rosie Jones
Sean Lock and Sara Pascoe take on Alan Carr and Tom Allen, while Rosie Jones is in Dictionary Corner.
06. Harriet Kemsley, Alan Carr, Catherine Tate, Adam Buxton
Sean Lock and Harriet Kemsley take on special guest team captain Alan Carr and Catherine Tate, while Adam Buxton joins Susie Dent in Dictionary Corner
07. Katherine Ryan, Joe Wilkinson, Adam Riches
Sean Lock and Katherine Ryan take on Jon Richardson and Joe Wilkinson. Adam Riches as Sean Bean is in Dictionary Corner.