History of ideas in all BBC programmes
Satirist Joe Queenan charts the rise and fall of the 'nudge nudge wink wink' epidemic.
Robin Ince listens back to some of the BBC archive of philosopher Bertrand Russell.
Sir Isaiah Berlin died 20 years ago. Where are the Berlins of today? Jonathan Wolff asks.
Gyles Brandreth surveys the history of sentimentality, wondering whether to sneer or cheer