Professor Marcus du Sautoy argues that mathematics drives science.
Georg Cantor defined infinity as the size of the never-ending list of counting numbers.
David Nixon and BBC NOW join Charles Hazlewood to explore Russian Ballet.
Naomi Alderman tells the story of Pavlov and his selectively drooling dogs.
Is RFID introducing an 'internet of things'? Or are its glory days behind it?
Stephen Johnson and the Royal String Quartet explore Shostakovich's 8th String Quartet.
Stephen Johnson on how the music of Shostakovich helped him survive clinical depression.
Stephen Johnson joins Christian Poltera to explore Shostakovich's First Cello Concerto.
Stephen Johnson on the intricacies of Shostakovich's two trios for piano and strings.
Stephen Johnson explores the music and ideas behind Shostakovich's 9th Symphony.
How Vladimir Putin's experience as KGB agent in Germany shaped his career and behaviour.
Lesley Chamberlain tells the story of the Red Princess, Sofka Skipworth.
Mary Ann Sieghart explores what has shaped Vladimir Putin's view of the world.