In 2011 a distressed 999 call is made by Julie Dixon to say masked men have attacked, and her partner David is in a room on fire. But a different story later emerges.

Truck driver Collin Reeves calls the police and makes a sickening confession: he has stabbed both of his neighbours to death with a commando knife. But was is pre-meditated murder?

Glastonbury yoga teacher Dawn Lewis calls 999 and says that she has stabbed her lodger Glenn Richards in self-defence. Richards had a history of violence, so Lewis' story seems believable.

On 17th February 2014, 19-year-old Lewis Daynes calls the police to say he has stabbed 14-year-old Breck Bednar. Was this the culmination of a plan to take advantage of the younger teen?

When a retired accountant tells police she's stabbed her husband, she seems unrepentant. Did she snap under a weight of abuse?

Holiday-maker Mark Terry calls the police after his friend Gary Pocock is found dead on the beach, hideously beaten and unidentifiable except for a distinctive dragon ring he always wore.

Veteran British Airways pilot Robert Brown's call to the police about a serious domestic incident with his ex-wife, Joanna, is used as the starting point in investigating her murder. This episode explores the discovery that officers made at her cottage, Brown's arrest and a comparison between his confession and the far more sinister truth of what really happened

A panicked 999 call comes in from a man called Foster Christian, claiming he is being attacked in his own home. But later, survivor statements tell a very different story...

A coroner records a verdict of accidental death for Susan Nicholson. But her family believe there is more to the story: it isn't the first time her partner Robert Trigg has woken to find his partner has died.

David Browning, a married father of two, confesses that he has killed his boss, Jill. But he claims that he is not guilty of murder, on the grounds of diminished responsibility. But how will the jury decide?

Alan Jermey calls 999 to report that his house is on fire. When his partner Kirsty is found dead, Jermey claims someone broke in and murdered her. But the evidence does not mount up in his favour.

When a family refuse to accept their son Jack died of an overdose, they undertake their own investigation, and identify a man with Jack the night that he died. Dots are joined, connecting four murders.

When 33-year-old mother of five Sarah Wellgreen vanished from her home, her ex-partner Ben Lacomba reported her missing. But almost immediately, detectives sensed that something was not right.

The case of Raoul Moat, who attacked his ex-girlfriend, killed her new partner, and shot a police officer, before going on the run and leading Britain's law enforcement on a week-long manhunt. Through interviews with detectives, journalists and those caught in the middle of the chaos, this edition unravels the police work that brought the pursuit to its tragic end