If you have any Scottish ancestors you might be interested in listening to The Scots: A Genetic Journey. In this series Alistair Moffat explores the history of Scotland. In the first episode he talks about the spread of population from Iberia to Scotland and the discovery of possibly the oldest house in Scotland build around 7600 BCE. At the end of the episode Alistair has a DNA sample taken to discover his genetic history.
This first episode is available to listen to for another couple of days. Episode 2 is also online.