John Humphrys presents the celebrity version of Britain's toughest quiz. Four more celebrities take on the Mastermind challenge as actress and presenter Clare Grogan, singer-songwriter Newton Faulkner, gold medal-winning Paralympian Richard Whitehead and journalist Quentin Letts answer questions on Doris Day, Harry Nilsson, Tottenham Hotspur and Hereford Cathedral.

John Humphrys presents the celebrity version of Britain's toughest quiz. Four more celebrities take on the Mastermind challenge as presenter Tony Livesey, comedian Ava Vidal, presenter Monty Halls and pop-star turned broadcaster Reverend Richard Coles answer questions on the Jam, Buffy the Vampire Slayer, Jacques Cousteau and EF Benson's Mapp and Lucia novels.

John Humphrys presents the celebrity version of Britain's toughest quiz. Four more celebrities take on the Mastermind challenge as comedian Fred MacAulay, crime author Mark Billingham, actress Georgia Henshaw and The Archers' Brian Aldridge - Charles Collingwood - answer questions on the sitcom Porridge, Elvis Costello, TV series Sherlock and Hampshire County Cricket Club.

John Humphrys presents the celebrity version of Britain's toughest quiz. Four more celebrities take on the Mastermind challenge as comedian Hal Cruttenden, actress Clare Perkins, Olympic gold medal-winning rower Sophie Hosking and Radio 1 DJ Huw Stephens answer questions on the Rocky films, Cormac McCarthy's Border Trilogy, the London Underground and Johnny Cash.

Four more celebrities take on the Mastermind challenge as the poet John Cooper Clarke, Ben Faulks from CBeebies' Mr Bloom's Nursery, the entertainer Roy Hudd and the singer-songwriter Frank Turner answer questions on the films of Elvis Presley, Sir Ernest Shackleton's Trans-Antarctic expedition, the music hall star Dan Leno and Iron Maiden.

Citizen Khan star Adil Ray, Dr Mark Porter, comedian Kevin Eldon and Jordan Stephens from Rizzle Kicks answer questions on Fawlty Towers, the Porsche 911, the Beatles and Ross Geller from Friends.

Comedian Josh Widdicombe, athlete-turned-commentator Katharine Merry, Emmerdale actress Sian Reese-Williams and wildlife presenter Nick Baker take on the Mastermind chair answering questions on Blur, Aston Villa, the sitcom Black Books and Alfred Russel Wallace.

Four more celebrities take on the famous black chair as the Formula One commentator James Allen, the actor David Bradley, Hebburn star Chris Ramsey and Shobu Kapoor from Citizen Khan answer questions on Roald Dahl, Max Wall, The Sopranos and Jack Kerouac's On the Road.

Presenter Gail Porter, Red Dwarf star Danny John-Jules, food writer Prue Leith and BBC Breakfast's Mike Bushell take on the Mastermind chair answering questions on number one singles, the choreographer Bob Fosse, wartime food and Alan Partridge.

Another four famous faces risk their reputations on television's toughest quiz. BBC Radio 6 Music presenter Shaun Keaveny, comedian Mark Watson, Antiques Roadshow expert Bunny Campione and the writer of the 2012 Olympic Opening Ceremony, Frank Cottrell Boyce answer questions on Led Zeppelin, the Canterbury Tales, Stewart Granger and Oliver Postgate.