Two years ago, Queensland woman 'Ellie' got a call that changed her life. It was from her first love, a man named James. She had met him in 2001. They were together for about a year before James broke it off. But in 2018, he phoned her in Australia to make a startling confession: he'd been living a lie. He was an undercover police officer who'd been sent to spy on her and those in her friendship circle. Ellie, who's never spoken publicly before, is one of at least 30 women who were tricked into having relationships with undercover officers working for London's Metropolitan Police Service. Some undercover officers, including James, adopted the identities of dead children and infiltrated environmental protest groups. A handful fathered children with their targets. Another former officer started a new life in Australia, before his target tracked him down in Sydney. The long-running scandal has finally culminated in public hearings of the Undercover Policing Inquiry, one of the biggest in UK legal history. In 1968, a secret unit was established within the Special Branch of the Metropolitan Police, known as the Special Demonstration Squad (SDS). In the decades that followed, SDS's reach expanded as it gathered intelligence on more than 1,000 political groups, often feeding that information to the security service, MI5. Some right-wing organisations were infiltrated, but the majority of targets were left-wing groups that challenged the status quo. The Special Demonstration Squad was disbanded in 2008.