The hidden story of the 1989 fatwa issued by Ayatollah Khomeini against Salman Rushdie.
Dr Thomas Dixon explores the impact of World War One on male friendship.
Arthur C Clarke talks to Nigel Acheson at his home in Sri Lanka, in his seventieth year.
Science fiction author Arthur C. Clarke talks about his admiration for Stapledon
Sir Terry Pratchett on his 50th book.
Melvyn Bragg and guests discuss influential British philosopher Bertrand Russell.
Robin Ince listens back to some of the BBC archive of philosopher Bertrand Russell.
Bertrand Russell considers the roles of state control in a progressive society.
Comedian David Walliams pays tribute to his friend the television presenter Dale Winton
Derren Brown gets inside the mind of musical wizard and fellow sceptic Tim Minchin.
Did Douglas Adams predict the future in the year 2000? Mitch Benn finds out.
John Lloyd uncovers the private papers of the late Douglas Adams.
Jon Canter shared a flat with Douglas Adams while the latter struggled for success.
Douglas Adams on his approach to creation, and how that would play out if he painted.
Douglas Adams on Monty Python, imagination and storytelling.
Douglas Adams on how Winnie the Pooh influenced his writing style.
Eddie Redmayne interviewed by Sanjeev Bhaskar.
BBC Radio 4 pays tribute to Prof Stephen Hawking.
James Naughtie profiles the molecular biologist who helped discover the structure of DNA.
Patrick Wright examines the long history of anxiety over threats to English identity.