Actors John Simm and Philip Glenister don't expect some news that a DNA test reveals about John's dad while delving into their family histories.

The Royle Family stars Ricky Tomlinson and Sue Johnston use DNA and genealogy to reconnect with lost cousins and unearth long-held family secrets.

Actors James Nesbitt and Sarah Parish learn about an educator who fought for working-class children to get an education and a First World War hero.