Topics include the works of Jane Austen, the Eurovision Song Contest, Albert Einstein and the history of the Grand National 1990-2004.
John Humphrys poses questions about JK Rowling's Harry Potter novels, the history of the VW Beetle, Liverpool Football Club 1995-2004, and the Girls in Love series by Jacqueline Wilson.
The contestants answer questions about the life of Mozart, Malorie Blackman's Noughts and Crosses series, British Olympic medallists from 1948 to 2000 and The Simpsons. Show more
Children face questions about volcanoes, the American Civil War, Pippa Funnell and The Lord of the Rings book.
Contestants face questions about The Beatles, dolphins, the complete works of Beatrix Potter and the life and career of Alexander Graham Bell.
John Humphrys asks questions about Enid Blyton's Famous Five books, the history of Cadbury's, Egyptian deities and the Back to the Future trilogy.
The contestants' specialist subjects include Formula One between 1990 and 2004, sharks, the life and reign of Queen Victoria and Anthony Horowitz's Alex Rider novels.
Specialist subjects are the House of Stuart, Roald Dahl's books, The Saga of Darren Shan, The Simpsons, A Series of Unfortunate Events by Lemony Snicket and the life and works of Cezanne. Show more
The contestants' specialist subjects are The Vicar of Dibley, the Artemis Fowl series by Eoin Colfer, the life and career of Howard Carter and Sir Winston Churchill.
Specialist subjects include the history of the English longbow, Star Wars, His Dark Materials by Philip Pullman and black holes.
Specialist subjects include dinosaurs, Vincent Van Gogh, the life and career of Sachin Tendulkar and the Tudors.
Topics include Michael Schumacher, Fawlty Towers, the films of Hayao Miyazaki and the Plantagenets.
The topics chosen by the finalists include James Bond villains, frogs, Western European geography and The Princess Diaries.
John Humphrys hosts the second heat of the Junior version of Britain's toughest quiz. Show more
John Humphrys poses the questions as contestants aged 10 and 11 face specialist and general knowledge questions in the final of the Junior version of Britain's toughest quiz. Show more
John Humphrys poses the questions as four contestants, aged only 10 and 11, face specialist and general knowledge questions in the Junior version of Britain's toughest quiz. Show more
John Humphrys poses the questions as four contestants, aged only 10 and 11, face specialist and general knowledge questions in the Junior version of Britain's toughest quiz. Show more
John Humphrys poses questions about the Cottingley Fairies hoax, FIFA World Cup 2006, Philip Pullman's His Dark Materials trilogy and Madame Tussaud.
John Humphrys poses the questions in the final. Jackson Pollock, Liverpool Football Club, TinTin, Andrew Flintoff and The Battle of Waterloo are among the specialist subjects. Show more
A new series of the Junior version of Britain's toughest quiz. John Humphrys invites four children aged just 10 and 11 to answer questions in the infamous black chair. Show more