Sir Patrick Moore, Chris Lintott and Chris North find out what the universe is made of.
BBC One except Wales
BBC One Wales
Neil Oliver meets the man who designed the first hydrogen car in Unst. (R)
BBC Two Wales
2/6 Comparing exhaustive footage of London in the 1940s with the city of today. (R)
1/13 How did the unique wildlife of the Galapagos get there and what allows them to thrive? (R)
2/3 Richard discovers how the Cape vulture has inspired a flying submarine.
Tuesday 6 November 2012