A 1990s-themed edition featuring Tamara Beckwith, Saffron Sprackling, Clare Buckfield, John Pickard, Mr Motivator, Diane Youdale, Nick Moran and Vas Blackwood.

A Eurovision special featuring Jay Aston, Mike Nolan, SuRie, Dana, Jade Ewen, John Lundvik, Niamh Kavanagh and Mans Zelmerlow.

A special episode featuring impressionists Debra Stephenson, Luke Kempner, Jan Ravens, Ronni Ancona, Rory Bremner, Jess Robinson, Steve Nallon and Josh Berry.

A drama-themed edition featuring Hugh Fraser, Philip Jackson, Julia Brown, Arthur Darvill, Philip Franks, Cathy Tyson, Trudie Goodwin and Cathy Shipton.

With Dianne Buswell, Max George, Sally Phillips, Milton Jones, John Barnes, Dave Beasant, Jodie Kidd and Lisa Snowdon. Featuring a special performance from Paul Heaton and Jacqui Abbott.

A writers special featuring Martina Cole, Mark Billingham, Liz Pichon, Nick Sharratt, Juno Dawson, Nadia Shireen, Adam Kay and Ian McMillan.

A comedians edition featuring Catherine Bohart, Rachel Parris, Ivo Graham, Elis James, Milton Jones, Stephen K Amos, David O'Doherty and Rose Matafeo.

A food special, featuring Brian Turner, Stacie Stewart, Chris Bavin, Sabrina Ghayour, Jay Rayner, Loyd Grossman, Rick Stein and Jack Stein.

A music special featuring Lee Thompson, Pauline Black, Steve Brown, Barbara Dickson, Kimberly Wyatt, Cathy Dennis, Heather Small and Steve Hogarth.

A radio-themed edition featuring Johnnie Walker, Sally Boazman, Stuart Maconie, Elizabeth Alker, Scott Mills, Chris Stark, Vick Hope and Harriet Scott.

A sitcoms special featuring Richard Gibson, Kim Hartman, Ewen Macintosh, Patrick Baladi, Nina Wadia, Abdullah Afzal, Perry Benson and Jeffrey Holland.

A sitcoms-themed episode featuring Tim Healy, Maggie Ollerenshaw, Kerry Godliman, Tom Basden, Mina Anwar, Serena Evans, Judy Cornwell and Jeremy Gittins.

A special family edition featuring Marcus and Helen Brigstocke, David and Frankie Seaman, Naughty Boy and Aisha Khan, and Toby and Fia Tarrant.

A special episode featuring former child stars, including Adrian Hall, Sally Thomsett and Julie Dawn Cole.

A special stand-up comedy edition of the general knowledge quiz, with Rosie Jones, Miles Jupp, Russell Kane, Lucy Beaumont, Rhys James, Lloyd Griffith, Phil Wang and Sindhu Vee.

A comedians special featuring Ed Byrne, Jessie Cave, Dane Baptiste, Shazia Mirza, Angela Barnes, Rich Hall, Patrick Monahan and Junior Simpson.

Featuring four teams of celebrity couples, including Izzy and Harry Judd, Nik and Eva Speakman and Dan Renton Skinner and Olivia Lee.

Featuring John Shuttleworth, Rev Kate Bottley, Robin Askwith, Sue Jenkins, Gyles Brandreth, Baga Chipz, Rachel Yankey and Faye White.

A 1980s-themed episode featuring Tommy Boyd, Andy Crane, Brinsley Forde, Denise Pearson, Linda Lusardi, Vicki Michelle, Jan Leeming and John Kettley. With a special performance from Jason Donovan.

A special family edition of the general knowledge quiz in which four teams try to come up with the answers that no-one else could think of. Presented by Alexander Armstrong and co-host Richard Osman, with contestants Andi Oliver, Miquita Oliver, Gareth Malone, Jamie Malone, Kate Robbins, Molly Robbins, Claire Richards and Reece Hill.

A special sci-fi and fantasy edition of the general knowledge quiz in which four teams try to come up with answers that no-one else could think of. Presented by Alexander Armstrong and co-host Richard Osman, with contestants Sophie Aldred, Carole Ann Ford, Josh Herdman, Louis Cordice, Sandra Dickinson, John Duttine, Kiran Shah and Clive Mantle.

A special Olympics edition featuring Anthony Ogogo, Helen Glover, Matthew Pinsent, James Cracknell, Nick Skelton, JJ Chalmers, Jeanette Kwakye and Mark Foster.

Four teams of journalists try to come up with answers that no-one else could think of. Presented by Alexander Armstrong and co-host Richard Osman, with contestants James O'Brien, Cathy Newman, Dermot Murnaghan, Natasha Kaplinsky, Ella Whelan, Nigel Nelson, Kevin Maguire and Isabel Oakeshott.

A music-themed edition featuring Patti Boulaye, YolanDa Brown, JB Gill, Blaze Bayley, Dave Bartram, Jess Conrad, Dan Donovan and Brix Smith Start.

Featuring Patsy Kensit, Jake Canuso, Jenny Hanley, David Hamilton, Chris Jarvis, Pui Fan Lee, Andrea McLean and Linda Robson.