Sally Magnusson presents a series exploring the practice of researching family history, one of the UK's most rapidly growing pastimes. With genealogist Nick Barratt, she explores how to find out what our ancestors did for a living and how to use this information to discover more about what their lives were like and perhaps even what sort of people they were. They tackle the subject of illegitimacy, which has been common in every century and in every social class.