The unique bond between brothers is celebrated in the cases of Lee Sharp - who was told he was a foundling - and Peter MacDonald, who wants to see his big brother Trevor again.

This episode follows two birth parents. Paula, who is searching for the son she became pregnant with in 1979, & Justus Augustin, who hopes to find a daughter put up for adoption.

This episode follows Jayne - a woman who wants to tell her older brother that he was always thought of - and Kevin, who is determined to find his eldest daughter for his late wife.

This episode follows the cases of Mark Thorpe - who yearns to find an older brother - and Jane Lewis, who was taken into foster care at 11 days old and seeks her three brothers.

This episode follows the cases of Alan Parker - who is desperate to solve the mystery of why his mother left the family home - and Katherine Fletcher, who seeks her birth mother.

This episode follows the cases of Scott - who is desperate to find an older sister who was adopted - and Jackie, whose late mother put her baby sister up for adoption.

This episode features two women searching for older siblings they've never met - while Mandy wants to find her big sister, Jane wants to find the brother that her mum had.