Since the programme began in 2011, Long Lost Family has reunited more than 100 people with relatives. In this series, Davina McCall and Nicky Campbell revisit nine of the most extraordinary searches. In the first edition, they catch up with twins Jennifer and Kathleen, who unknowingly lived just three miles from each other in Rotherham before their reunion, and Polly and Steve, a mother and son who had been apart for more than 50 years. Plus, Laura and her half-sister Alison, who were brought together after Laura's mother died.