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.

Case 1: In February 1997, Roger Andrews is confronted in his home by a man holding a gun. In a split second decision Roger fights back with his own pistol and shoots the man 3 times. The man survives and is arrested by the police. Quickly links between the man arrested and another crime emerge - the murder of a retired town clerk in Ramsgate in 1996.

Case 2: In June 2010, 14-year-old Lillian Groves was killed outside her home in New Addlington in Surrey by speeding motorist John Page, who had been smoking cannabis. This is the story of Lillian's parents' fight to change the legal system that had allowed this man to escape a fitting punishment.