A celebrity special featuring Leslie Ash, Lucy Benjamin, Todd Carty, Robin Ince, Josie Long, Joe McElderry, Claire Sweeney and Nina Wadia.

A special edition featuring Nina Conti, Tim Vine, Denis Lawson, Rosie Marcel, Shazia Mirza, Sara Barron, John Pienaar and Joanna Gosling.

A special edition featuring Matthew Pinsent, Sam Quek, Geoff Norcott, Kerry Howard, Rachel Parris, Marcus Brigstocke, Valentine Warner and Michelle Collins.

A special music 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 MC Romeo, MC Harvey, Noel Sullivan, Suzanne Shaw, Keith Duffy, Brian McFadden, Natasha Hamilton and Liz McClarnon.

Featuring Cheryl Baker, Anne Diamond, Kate Thornton, Denise van Outen, Duncan James, Rory Bremner, Kae Kurd and Kriss Akabusi.

A Strictly special featuring Richard Coles, Anton Du Beke, Luba Mushtuk, Anneka Rice, Sunetra Sarker, Jacqui Smith, Lauren Steadman and Emma Weymouth.

An Olympics- and Paralympics-themed episode featuring Jazz Carlin, Alice Tai, James Cracknell, Dame Katherine Grainger, Denise Lewis, Derek Redmond, Greg Rutherford and Christine Ohuruogu.

A celebrity special 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 Dr Christian Jessen, Dr Ranj Singh, Matt Richardson, Andrew Maxwell, Katie Thistleton, Michelle Ackerley, Mark Moraghan and Tina Hobley.

A special presenters 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 Matthew Wright, Rav Wilding, Paul Martin, Holly Hamilton, Mark Lane, Janet Street-Porter CBE, Martin Roberts and Fee Mak.

Special edition featuring Mike Nolan, Toyah Willcox, Dr Linda Papadopolous, Dr Zoe Williams, Nathan Caton, Suzi Ruffell, Anthony Costa and Shaun Williamson.

A special Blue Peter edition featuring Ayo Akinwolere, Mark Curry, Zoe Salmon, Simon Thomas, Mwaka Mudenda, Richie Driss, Katy Hill and Tim Vincent.

Featuring Chris Hollins, Dallas Campbell, Phil Daniels, Levi Roots, Lou Sanders, Jayde Adams, Lucy Porter and Dave Johns. Presented by Alexander Armstrong and Richard Osman.

A special writers edition featuring Steve Cavanagh, Paul Tonkinson, Emma Kennedy, Jen Brister, Kate Mosse , Adele Parks, Chris Riddell and Lemn Sissay

A special celebrity 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 Bonnie Langford, Arthur Smith, Annabel Giles, Tony Hawks, Diane-Louise Jordan, Melinda Messenger, Les Dennis and Richard Herring. 

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 football-themed edition featuring Chloe Morgan, Jenna Schillaci, Peter Shilton, Paul Parker, Jackie McNamara, John Hartson, Rachel Brown-Finnis and David James.

Presented by Alexander Armstrong and Richard Osman. Featuring Gok Wan MBE, Brian Conley, Richard 'Dick' McCourt, Dominic 'Dom' Wood, Libby Clegg MBE, Stef Reid MBE, Stephen K Amos and Zoe Lyons.

A Casualty-themed edition featuring Di Botcher, George Rainsford, Ian Bleasdale, Sue Devaney, Azuka Oforka, James Redmond, Clive Mantle and Julia Watson.

Featuring stars of classic kids' TV, including Peter Purves, Lesley Judd, Jane Tucker, Freddy Marks, Dave Benson Phillips, Mike Read, Kirsten O'Brien and Terrence Hardiman.

Series 13: Writers

A celebrity writers 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 Jane Fallon, Fiona Neill, Nadia Shireen, Conn Iggulden, Richard Madeley, Allison Pearson, Tim Weaver and Jill Mansell.

A celebrity 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, and featuring former child stars Adrian Hall, Julie Dawn Cole, Lyndyann Barrass, David Peachey, Nick Bond-Owen, Jessica Forte, Sally Thomsett and Tyger Drew-Honey. 

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

Alexander Armstrong and Richard Osman present a celebrity Impressionists edition of the general knowledge quiz in which they try to come up with the least likely correct answers to a series of questions posed to members of the public. The contestants are Debra Stephenson, Luke Kempner, Jan Ravens, Ronni Ancona, Rory Bremner, Jess Robinson, Steve Nallon and Josh Berry.

A celebrity radio 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. Featuring Johnnie Walker, Sally Boazman, Stuart Maconie, Elizabeth Alker, Scott Mills, Chris Stark, Vick Hope and Harriet Scott.