1980s edition with Stephanie Beacham, Anne Diamond, Rustie Lee and Willie Thorne.

Blue Peter edition with Peter Purves, Janet Ellis, Anthea Turner and Barney Harwood.

Theatrical edition with David Bradley, Warwick Davis, Jenny Seagrove and Connie Fisher.

Teachers edition including Gwyneth Powell, Michelle Gayle, Melanie Hill and Mike Steer.

Featuring Anna Karen and Sally Thomsett, Ed Stewart and Sally James, Rick Wakeman and Roy Wood and Madeline Smith and Paul Henry.

A special celebrity medical edition featuring Ian Bleasdale and Sunetra Sarker, Duncan Preston and Nichola McAuliffe, Ian Kelsey and Paul Bradley and Dr Sarah Jarvis and George Layton.

A special celebrity comedy edition featuring Tim Brooke-Taylor and John Bird, Don Warrington and Ray Burdis, Dom Joly and Robert Llewellyn, and Rhona Cameron and Richard Herring.

Crime-themed edition with Lisa Maxwell, Mark Wingett, Sue Cook and Donal MacIntyre.

Eurovision-themed edition with Johnny Logan, Dana, Cheryl Baker and Mike Nolan.

A special celebrity World Cup edition featuring Sir Geoff Hurst MBE and George Cohen MBE, Peter Shilton and Steve Bull, Graeme Le Saux and Jonathan Pearce, and Hope Powell and Casey Stoney.

Celebrity edition of the quiz in which contestants try to score as few points as possible by plumbing the depths of their general knowledge to come up with the answers no-one else can think of. Presented by Alexander Armstrong and Richard Osman.

A special celebrity edition featuring Lesley Joseph and Linda Robson, Ronni Ancona and Phil Cornwell, Su Pollard and Ruth Madoc and Josh Widdicombe and Sara Pascoe.

A special celebrity soaps edition featuring Laila Morse and Nina Wadia, Claire King and Deena Payne, Stefan Dennis and Rebekah Elmaloglou and Ray Quinn and Louis Emerick.

A special celebrity music edition featuring Mark King and Toyah Wilcox, Carol Decker and Limahl, Dave Hill and Dave Bartram and Antony Costa and Scott Robinson.

A special celebrity food and drink edition featuring Oz Clarke and Jilly Goolden, John Burton-Race and Aldo Zilli, Loyd Grossman and Jay Rayner and Emma Kennedy and Sean Wilson.

A special celebrity kids' TV edition featuring Johnny Ball and Carol Chell, Dave Benson-Phillips and Pat Sharp, Andrew Agnew and Julie Wilson Nimmo, and Jim Howick and Ben Willbond.

A special celebrity theatre edition featuring Simon Callow and Imogen Stubbs, Lysette Anthony and Christopher Timothy, Gwen Taylor and Keith Barron, and Claire Sweeney and Simon Shepherd.

A special celebrity 1990s edition featuring Ulrika Jonsson and Diane Youdale, Trevor Neal and Simon Hickson, Terry Christian and Katie Puckrik and Richard and Fred Fairbrass of Right Said Fred.

A special celebrity experts edition featuring Professor Alice Roberts and Dick Strawbridge, Eric Knowles and Mark Stacey, Nicky Clarke and Michael Douglas, and Martin Hughes-Games and Michaela Strachan.

A special celebrity radio edition featuring Dame Jenni Murray and Tim Bentinck, Liz Kershaw and David 'Kid' Jensen, Ken Bruce and Trevor Nelson and Huw Stephens and Sarah-Jane Crawford.

A special news celebrity edition featuring Kate Adie and Stanley Johnson, Kelvin MacKenzie and John Sergeant, Julia Hartley-Brewer and Nick Ferrari and Jon Sopel and Lucy Siegle.

A special celebrity edition featuring Anton Du Beke and Kate Garraway, Bonnie Langford and Todd Carty, Yvette Fielding and Mark Watson and Jon Culshaw and Debra Stephenson.

A special celebrity writers edition featuring Robert Llewellyn and Dominic Holland, Rod Liddle and John Cooper Clarke, Val McDermid and Allison Pearson and Michael Rosen and Muriel Gray.

A special celebrity edition featuring Vanessa Feltz and Penny Smith, Kriss Akabusi and Roger Black, Keith Chegwin and Andrew Castle and Louie Spence and Carol McGiffin.

A special celebrity sport edition featuring Dennis Taylor and Bobby George, Ugo Monye and Phil Vickery, Sharron Davies and Louise Hazel and Dwain Chambers and Gail Emms.