Long Lost Family (2011)

Season 15: Episode 6

Aged 12, Scott discovered the people he'd called mum and dad were actually his grandparents, and his mother was the woman he'd thought was his older sister. After learning that he had an actual older sister who'd been adopted, he is now desperate to find her. In the second case, Jackie was in her twenties when her late mother revealed a shocking truth - she'd had another daughter, younger than Jackie, who she'd put up for adoption.