Britain's young brain boxes get to prove their worth in the infamous black chair. In the week's first neat, John Humphrys grills children aged 10 and 11 on the topics of Formula One (1990-2004), sharks, the life and reign of Queen Victoria and Anthony Horowitz's Alex Rider novels.

Four pre-teen brain boxes tackle the works of Jane Austen, the Eurovision Song Contest, Albert Einstein and the history of the Grand National (1990-2004).

Subjects in tonight's heat are the history of the VW Beetle, the Harry Potter novels by JK Rowling, Liverpool Football Club (1995-2004) and the Girls in Love series by Jacqueline Wilson. With John Humphrys.

Tonight's specialist subjects are the life of Mozart, the Noughts and Crosses series by Malorie Blackman, British Olympic medallists (1948-2000) and The Simpsons.

Subjects tonight in the last of the heats before tomorrow's grand final are dinosaurs, Vincent Van Gogh, the Indian cricketer Sachin Tendulkar and the Tudors.

Are you an authority on James Bond villains? Or an expert on the life cycle of frogs, perhaps? Test your grey matter against tonight's five young quiz-show boffins, whose other specialist subjects include the book and film versions of Meg Cabot's The Princess Diaries and the geographies of Australia and western Europe.

Some of the UK's cleverest ten- and 11-years-olds compete in a junior version of the quiz, showing weeknights with the final next Saturday. Specialist subjects are The Vicar of Dibley, Eoin Colfer's Artemis Fowl novels, archaeologist Howard Carter and Winston Churchill. With John Humphrys. Alan Titchmarsh in the chair

Dolphins, the Beatles, the complete works of Beatrix Potter and the life and career of Alexander Graham Bell are the specialist subjects.

Eclectic specialist subjects tonight are Enid Blyton's Famous Five books; the history of Cadbury; Egyptian deities; and the Back to the Future movies. Presented by John Humphrys.

John Humphrys quizzes four more ten- and 11-year-olds. Tonight's subjects are the history of the English longbow, the Star Wars films, black holes and the Philip Pullman trilogy His Dark Materials.

Specialist subjects in the last heat are the Plantagenets; the life and career of Michael Schumacher; Fawlty Towers; and the films of Hayao Miyazaki. The final is tomorrow. Alan Titchmarsh in the chai

Pint-sized brainboxes battle it out in the quiz's climax. Specialist subjects are Lemony Snicket's A Series of Unfortunate Events books, Paul Cezanne, Roald Dahl, The Simpsons, the House of Stuart, and the Darren Shan novel series. With John Humphrys.

Pint-sized brainboxes face the infamous black chair, tonight tackling questions on Abba, big cats, the reign of Henry VIII and the James Bond films. With John Humphrys.

Pint-sized brainboxes face the infamous black chair, tonight tackling questions on volcanos, the American Civil War, showjumper Pippa Funnell and the Lord of the Rings books. With John Humphrys.

More pint-sized brainboxes step up to the infamous black chair, answering questions on the history of the space shuttle, English Test cricket since 2000, The Dam Busters and Harry Potter. John Humphrys is the man with the answers.

The Roman Mysteries by Caroline Lawrence, the history of the Spitfire, birds of prey and the London Underground are the specialist subjects for the brainy boys and girls. John Humphrys hosts.

In the last of the heats, cricketing great WG Grace, heroes from Marvel's comic books, the patron saint of Ireland, St Patrick, and The Hitchhiker's Guide to the Galaxy by Douglas Adams are the specialist subjects for the brainy boys and girls. John Humphrys hosts.

It's the final of the toughest children's quiz in Britain. John Humphrys offers six contestants a seat in the infamous black chair to answer questions on their specialist subjects: the mammals of the African plains, the life of Roald Dahl , Chelsea FC, Doctor Who in 2005, the Zulu War and Greek mythology.

John Humphrys invites four talented youngsters to sit in the famous black chair.

Pint-sized boffins are quizzed on classical ballet, the Mini car, Green Day and Elizabeth I.

Subjects are Take That, the Redwall Tales, Dr. Barnardo and Seven Wonders of the Ancient World.

Subjects are Hancock's Half-Hour, Emmeline Pankhurst, The Chronicles of Narnia and Nelson Mandela.

Subjects are the history and traditions of Jewish festivals, Bob Marley, penguins and The Edge Chronicles.

Subjects for the finalists include Jackson Pollock, Liverpool FC, Tintin and Andrew Flintoff.

In the children's version of the enduring quiz, John Humphrys invites ten and eleven year olds to answer questions in the infamous black chair. Topics tonight are Mahatma Gandhi, Antarctica, Johannes Vermeer and the Jurassic Park film trilogy.

In tonight's second heat of the competition, the specialised subjects include Rosa Parks, the Amazon rainforest, Alexander the Great and the Roswell Incident. Presented by John Humphrys.

Four brave children cower down in the black chair and answer questions on Walt Disney, Oldham Athletic FC, William Wallace and the My Story series of books.

Children answer questions on the Titanic, Tiger Woods, crocodilians and William Wilberforce.

The four finalists compete for the title, with specialist subjects Sir Isaac Newton, the Spanish Armada, Alfred the Great and the film-maker George Lucas.