Examining the case of pub landlord Stephen French, who murdered a customer at the Wisbech Arms, Cambridgeshire.

The story of Alan Jermey, a martial arts expert from Surrey who murdered his partner after she told him she had fallen in love with her boss.

Jacqueline Crymble plotted the execution of her husband in a bid to get her hands on his life insurance.

The disturbing story of Jennifer Pan, who was found guilty of staging a home invasion with the intention of killing her parents.

The story of Anna Hurd, who was murdered by her clingy and controlling boyfriend Anthony J Mitchell after she tried to break up with him.

The disturbing story of Alan Evans, who tried to get away with murdering his wife by pretending she had fallen down the stairs, after she found out about his affair.

In 2010, Robin Garbutt called 999 to report that his wife has been murdered by an armed robber in their North Yorkshire home. This episode examines the case.

The case of farmer Robert Wilson, who ran over his wife with a tractor, but claimed it was an accident until it emerged he has been living a double-life.

Dominic Isom's 999 call to report his fiance Samantha Henderson missing prompted a police manhunt throughout Dorset's picturesque Corfe Castle. As family and friends supported Dominic Isom and joined the hunt to find Samantha, police would discover a trail of clues that would begin a murder investigation.

On October 13th 2011, Christopher Strettle called 999 to report being confronted by his childhood friend Christopher Honnor who had come at him armed with a gun. The ensuing struggle had resulted in the gun going off. But as forensics began to investigate the Prescot shooting, a very different version of events would begin to emerge.

In Acomb, York, police received a concerned 999 call reporting the erratic behaviour of Mark Webb threatening to self harm. When a lone police officer arrived to check the disturbance, Mark Webb was found dead with his throat cut. But a neighbour's eyewitness account would throw the investigation into turmoil and lead to the arrest of four of Acomb's residents.

A shared house in Canterbury had regularly been visited by police on account of arguments between the housemates. But on the 29th March 2016 a 999 call led police to discover a horrific blood soaked murder scene with two victims stabbed to death and two others in critical condition. The following police investigation would uncover a violent past, a web of lies and a conspiracy to conceal the murder weapon.

The unexpected death of Caroline Devlin on the 26th March 2006 was met with an outpouring of grief from her four children and her boyfriend Robert Trigg. The post mortem whilst inconclusive suspected the cause of death as a brain aneurysm. Five years later, police received a 999 call from Robert Trigg reporting yet another unexplained death, his new girlfriend Susan Nicholson.

A wonderful life, a stockbroker husband and two beautiful children, the Byrne family from leafy Theydon Bois, Essex appeared to have the perfect life But the discovery of a secret affair, a long standing deceit and a house fire would end in the tragic loss of life and the hunt for a killer.

Julie Dixon and David Twigg were respected and beloved in the rural community of Burgh Le Marsh, Skegness, operating a thriving joinery business. Shock waves echoed throughout the county when masked intruders broke into the workshop, setting fire to the premises and killing David Twigg in the process. Emergency services were alerted by Julie Dixoris impassioned 999 call who had escaped the blaze.

Darlene and Keith Gentry appeared to have it all, a beautiful home in Robinson, Texas and three wonderful children. But a panicked 911 call reporting a home invasion had police rushing to the scene to find one of the occupants dead and the family's guns abandoned in the front yard. An undercover Texas Ranger operation would uncover a shocking conspiracy to get away with murder.