3/6 Clare walks on the Doward with Nadia Smith, who has had two partial hip replacements.
BBC Radio 4
In the first of a new series, Monty Don asks whether we should keep conservation secrets.
Anna Hill goes under glass to see how peppers are grown in the Lea Valley.
2/6 Clare Balding walks near Hay-on-Wye with a group who met while horse-trekking in Mongolia.
David Barton opens up his farm, and his heart, on living with Bovine TB.
5/5 David Attenborough searches for one of the rarest animals of Madagascar, the indri. (1961)
1/5 David Attenborough searches for the strange creatures that inhabit Madagascar. (1961)
2/5 David Attenborough encounters fish that walk, giant chameleons and the coelacanth. (1961)
3/5 David Attenborough looks at the people of Madagascar and their beliefs. (1961)
4/5 David Attenborough finds ant lions, giant moths, mud wasps and lemurs. (1961)