Case 1: In November 2000 a criminal gang attempted the most audacious robbery in British criminal history. The target - the world's most perfect diamond on display in the Millennium Dome. Using never-before-seen police footage, and testimony from the men who were there, this is the inside story of the heist of the millennium and the secret Flying Squad operation to foil it.

Case 2: Billy Stirrat was a happily married father of two that worked as a gamekeeper. His life was turned upside down following a miscarriage of justice involving his wrongful arrest for the possession of £500,000 worth of amphetamine.

Case 1: Jean and Tony Simester's son Darrell went missing in the year 2000. Fearing he was being held against his will, they contacted the police but, because of Darrell's age, were unable to find the help they so desperately needed. It was only after an observant member of the public, who'd read a newspaper article about Darrell, that they got the tip-off they needed. Having spent 13 years as a slave, Darrell was ill – both physically and mentally.

Case 2: In 2012 Shelley Roylance's husband tragically lost his life to cancer. In her grief Shelley turned to her family for support. Her eldest son Paul agreed to manage the £45,000 estate left to her by their father. The decision would have tragic consequences.