The foreign-affairs series focuses on genetic experimentation. Isabel Hilton reports from Norway on the Lebensborn, children parented by local woman and Nazi soldiers who were humiliated as outcasts after Germany's defeat. Dr Matt Ridley meets a small "inbred" community in Sardinia, the subject of a new controversy over genetic science, and Edward Stourton meets Italian fertility specialist Severino Antinori and his Vatican neighbours to discuss whether the gift of life should be left in God's hands.