Exploring the demolitions industry through the dismantling of Marischal College, Aberdeen.
5/6 Dave Gorman and Stewart Lee consider a CD player/microwave oven combo.
4/6 From bunk chairs to helium-filled bubble wrap, Neil Innes selects the best loopy idea.
Stephen Fry recalls the unnecessary panic that surrounded the so-called Millennium Bug.
BBC Radio 4
Adam Rutherford talks to the scientific advisors behind some well-known films and TV shows
Buzz Aldrin relives the dramatic moments of the final descent to the moon in 1969.