Four contestants answer questions on the famous black chair. Tonight's specialised subjects include Tottenham Hotspur FC, The Alan Clark Diaries, the electric guitar and the medieval abbeys and priories of England. With John Humphrys.

John Humphrys poses questions on French political history from 1815-1914, composer Gustav Holst, Harrison Ford films and Jacqueline Kennedy-Onassis.

John Humphrys poses questions on mountaineer Chris Bonington , Thomas Harris 's Hannibal Lecter novels, Kett's Rebellion and the life and music of Tom Lehrer.

John Humphrys poses testing questions on Peter Cook , Claude Monet , Errol Flynn and Edward VI.

Subjects include the first duke of Wellington, Stephen King novels, Johannes Kepler and The West Wing.

Tonight's specialised subjects include Henry Ford, German wines, Jennifer Aniston and Frida Kahlo.

Subjects include the battle of Gettysburg, Mario Lanza , Dante's Divine Comedy and Sir Edwin Lutyens

Tonight's specialist subjects are The Royle Family the life and music of Dimitri Tiomkin ; RF Delderfield's Swann novels and the life of Richard Nixon.

Tonight's specialised subjects are Peter Gabriel and Genesis, author David Eddings , inventor Barnes Wallis and snakes. With John Humphrys.

The specialist subjects this week are the University Boat Race, the novels of Evelyn Waugh , English coronations since 1066 and the life of Bob Marley.

This week's subjects are the life and work of William Thomson , Round the Home, the history of Tamla Motown and the career of chess player Alexander Alekhine.

Specialist subjects this week include the life and career of Frank Sinatra , Dorothy L Sayers 's Lord Peter Wimsey books and Polish history between AD 960 and 1696.

Tonight's specialist subjects are British Top 20 singles of the 1970s, The No.1 Ladies Detective Agency novels by Alexander McCall Smith , Hornby Railway and Joe Jackson and the Black Sox scandal of 1919.

Specialist subjects include Irish history 1916-1923, heavy metal band Iron Maiden, life and works of John Piper and the world war series of novels by Harry Turtledove.

This week's specialist subjects are the life and work of Joe Orton , American independent cinema, trees of the British Isles and Chelsea Football Club.

This week's specialist subjects are the life and work of Joe Orton, American independent cinema, trees of the British Isles and Chelsea Football Club.

Tonight's specialist subjects are the naval career of Nelson and Collingwood, the life and works of Primo Levi, the English pop band Erasure, and the life and career of Sir Richard Attenborough.

Tonight's subjects are the life and music of Johnny Cash, the development of photography since 1900, the life and works of Rene Magritte and ships of the Royal Navy from 1945 to 2007.

Specialist subjects are the life and career of politician Charles James Fox, the history of the Gaelic Athletic Association, real ale breweries of Britain and the life and works of writer Marcel Proust.

Tonight's subjects are the Adrian Mole novels by Sue Townsend, the works of French playwright Moliere, the history of sound recording from 1887 to 1925 and European female painters up until 1900.

Specialist subjects are the Anglo-Boer War, US soul group the Temptations, the Cotton Nero manuscript and Scottish monarchs from 843 to 1371.

As the contest reaches the semi-finals, specialist subjects are British butterflies, the life of Franz Kafka , 1985 TV drama Edge of Darkness and Red Clydeside 1914-1939, an era of political radicalism in Glasgow.

Contestants compete for a place in the Grand Final. Today's specialist subjects are: the novels of Joanne Harris , the Cricket World Cup, the life of Mary Tudor and the life and career of Robert Clive - also known as Clive of India. John Humphrys hosts.

In the final first-round heat, the specialist subjects are Punch magazine, the life of Kurt Cobain , the novels of Thomas Love Peacock , and TV series Survivors.

As the competition reaches the semi-final stage, specialist subjects are British butterflies, the life and work of writer Franz Kafka , cult 1985 TV drama Edge of Darkness and Red Clydeside 1914-1939, an era of political radicalism in Glasgow. With John Humphrys.