The episode features two stories centered on the bond between brothers. In the first story, Lee Sharp, who was told by his adoptive parents he was a foundling, discovers the truth and learns he has a sibling he never knew he had. In the second story, Peter MacDonald seeks to reunite with his older brother Trevor after being taken from his mother's arms as a baby during a dramatic train station incident 58 years ago.

This episode follows two birth parents. Paula, who is searching for the son she became pregnant with in 1979, and Justus Augustin, who came to London from St Lucia in the 1960s and sought to find his daughter after her mother's father insisted on adoption due to disapproval of their relationship.

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.