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Writers
Episode number: 1
Overview: A special writers edition featuring Steve Cavanagh, Paul Tonkinson, Emma Kennedy, Jen Brister, Kate Mosse , Adele Parks, Chris Riddell and Lemn Sissay.
Special
Episode number: 2
Overview: 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.
Blue Peter
Episode number: 3
Overview: A special Blue Peter edition featuring Ayo Akinwolere, Mark Curry, Zoe Salmon, Simon Thomas, Mwaka Mudenda, Richie Driss, Katy Hill and Tim Vincent.
Special
Episode number: 4
Overview: A special edition featuring Mike Nolan, Toyah Willcox, Dr Linda Papadopolous, Dr Zoe Williams, Nathan Caton, Suzi Ruffell, Anthony Costa and Shaun Williamson.
Presenters
Episode number: 5
Overview: Featuring Matthew Wright, Rav Wilding, Paul Martin, Holly Hamilton, Mark Lane, Janet Street-Porter, Martin Roberts and Fee Mak.
Special
Episode number: 6
Overview: Featuring Dr Christian Jessen, Dr Ranj Singh, Matt Richardson, Andrew Maxwell, Katie Thistleton, Michelle Ackerley, Mark Moraghan and Tina Hobley.
Olympics and Paralympics
Episode number: 7
Overview: 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.
Strictly
Episode number: 8
Overview: A Strictly special featuring Richard Coles, Anton Du Beke, Luba Mushtuk, Anneka Rice, Sunetra Sarker, Jacqui Smith, Lauren Steadman and Emma Weymouth.
Special
Episode number: 9
Overview: Featuring Cheryl Baker, Anne Diamond, Kate Thornton, Denise van Outen, Duncan James, Rory Bremner, Kae Kurd and Kriss Akabusi.
Music
Episode number: 10
Overview: A special edition featuring members of So Solid Crew, Hear'Say, Boyzone, Westlife and Atomic Kitten.
Special
Episode number: 11
Overview: A special edition featuring Matthew Pinsent, Sam Quek, Geoff Norcott, Kerry Howard, Rachel Parris, Marcus Brigstocke, Valentine Warner and Michelle Collins.
Special
Episode number: 12
Overview: A special edition featuring Nina Conti, Tim Vine, Denis Lawson, Rosie Marcel, Shazia Mirza, Sara Barron, John Pienaar and Joanna Gosling.
Special
Episode number: 13
Overview: A celebrity special featuring Leslie Ash, Lucy Benjamin, Todd Carty, Robin Ince, Josie Long, Joe McElderry, Claire Sweeney and Nina Wadia.
Sitcoms
Episode number: 14
Overview: A sitcoms special featuring Robert Llewellyn, Nigel Planer, Helen Monks, Steven Woodcock, Isy Suttie, Martin Trenaman, Jamie-Lee O'Donnell and Saoirse-Monica Jackson.
Special
Episode number: 15
Overview: A special episode featuring Sean Fletcher, the Rev Kate Bottley, Mark Chapman, Clare Balding, Oti Mabuse, Giovanni Pernice, Joe Swash and JB Gill.
Family
Episode number: 16
Overview: Featuring four family teams: James and David Acaster, Steve Cram and Allison Curbishley, Chris Packham and Megan McCubbin, and Anyika and Iffy Onuora.
Food
Episode number: 17
Overview: A special episode featuring cooks Alex Hollywood, Nancy Lam, Suzie Lee, Hugh Fearnley-Whittingstall, Liam Charles, Shivi Ramoutar, Rahul Mandal and Ellis Barrie.
Kids TV
Episode number: 18
Overview: A kids TV special featuring De'Graft Mensah, Shanequa Paris, Pat Sharp, Jayne Middlemiss, Andy Day, Philippa Forrester, Ortis Deley and Rani Price.
Soaps
Episode number: 19
Overview: A special edition featuring soap stars Adjoa Andoh, John Altman, Nick Cochrane, Paul Usher, Tricia Penrose, Denise Black, Jennifer Ellison and Ann Marie Davies.
Radio
Episode number: 20
Overview: Featuring radio presenters Jenni Murray, Samira Ahmed, OJ Borg, Gary Davies, Melvin Odoom, Rickie Haywood-Williams, Snoochie Shy and Nadia Jae.
Food
Episode number: 21
Overview: A food edition of the chefs quiz with chefs and cookery presenters Penny Smith, Sean Wilson, Romy Gill, Kwoklyn Wan, Paul Rankin, Ed Baines, Briony May-Williams and Kim-Joy Hewlett.
Special
Episode number: 22
Overview: A special edition featuring Greg McHugh, Kimberley Nixon, Dominic Holland, Ninia Benjamin, Max George, Tom Parker, Dom Joly and Ria Lina.
Family
Episode number: 23
Overview: A family edition featuring Ali Bastian, David O'Mahoney, Becky Downie, Ellie Downie, Sam Kane, Linda Lusardi, Gaynor Morgan and Willie Morgan.
Special
Episode number: 24
Overview: A celebrity special featuring Patsy Kensit, Sheree Murphy, Hal Cruttenden, Daliso Chaponda, Edwina Currie, Henry Bonsu, Janette Manrara and Karen Hauer.
Sport
Episode number: 25
Overview: A special edition featuring sporting stars Gus Fraser, Mike Gatting, Suzi Perry, Jules Breach, Bianca Walkden, Bianca Williams, Phil Vickery and Mark Foster.
News
Episode number: 26
Overview: A news edition featuring Juliet Mann, Gavin Ramjaun, Nelufar Hedayat, India Willoughby, Michael Buerk, John Sergeant, Andrea Byrne and Chris Rogers.
Bands
Episode number: 27
Overview: A special bands 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 guests Shaun Ryder, Bez, Mark Morriss, Kimberly Wyatt, Kelli Young, Rick Witter, Faye Tozer and Sabrina Washington