The genealogy show celebrates ten years and 100 episodes with a look back at the outstanding moments of the award-winning series. This one-off special features the shocks, surprises, tears and laughter that have marked the 100 celebrities' extraordinary journeys into their family histories. It remembers the dramatic highlights, from Jeremy Paxman's tears to Boris Johnson's astonishment at his incredible royal connections, as well as the sometimes inadvertently funny bits.