5/5 Stanley is determined to continue Livingstone's quest to find the source of the Nile.
4/5 David Livingstone aims to solve the mystery of the Nile's source once and for all.
3/5 Samuel Baker and his mistress Florence go in search of Lake Albert.
2/5 Burton is too weak to travel so Speke heads for the Rusizi River alone.
1/5 Richard Burton and John Speke leave for Africa in search of the source of the Nile.
6/6 Clare Balding meets Phoebe Smith, an expert in planning long walks and bagging bothies.
5/6 Clare Balding walks with Graham Hoyland and Gina Waggott along the Cotswold Way.
4/6 Clare Balding catches up with Lucy Newcombe as she walks around the coast of Britain.
3/6 Clare Balding walks from Coombe Gibbet to Highclere with the CEO of OS, Nigel Clifford.
2/6 Clare Balding meets four women about to embark on walking the Essex Way in three days.