Lithuanian Vitas Plytnykas worked as an agricultural migrant worker in Scotland. He murdered a fellow worker, leaving her severed head to be found by children on a Scottish beach. S2 Ep6
Dubbed the 'body in the bag' killer, Green murdered women and dumped their bodies in bags. It was the first time new advances in forensic face mapping were used for identification. S2 Ep2
Michael Ross was just 15 when he shot Shamsuddin Mahmood in the face and fled. When the police caught him a decade later, he was a Black Watch Sgt, guarding HM the Queen. S2 Ep1
Grieveson preyed on school boys in Sunderland, committing a series of four brutal murders, and attempting to disguise them as accidents involving solvent misuse. S1 Ep6
Longworth was the Commodore of his local sailing club. Enraged by his wife carrying out an affair, he plotted to murder her: staging her death as an act of suicide by hanging. S1 Ep5
Colin Gunn was one of the UK's most feared gangsters. After his nephew's death, he ordered a revenge killing against the parents of the boy whom he considered to be responsible. S1 Ep4
Dubbed the Vampire of Anglesey, Hardman carried out one of the most horrific murders in recent history, killing his elderly neighbour, removing her heart and drinking her blood. S1 Ep3
Terry Clifton murdered Tony Marrocco and Paul Sandham. He eluded the authorities in a game of cat and mouse, before the law eventually caught up with him. S1 Ep2
Stephen Akinmurele is one of the UK's most prolific but least known serial killers, murdering at least 5 elderly victims before he hung himself at Strangeways prison. S1 Ep1
When a change of will is followed by a sudden death, a local GP raises his suspicions to the police, who question whether those meant to help the victim, caused her demise. S3 Ep6
When a loving grandmother dies in the home of her daughter and grandson, many mourn the loss. But a tip of 15 years later raises questions that the police must answer. S3 Ep5
When tenants at a house receive a note from their live in landlord to say he has had to rush away, but to give the rent to a named tenant, questions are asked. S3 Ep4
When a trunk is left at a hotel, with the address of a missing woman's parents inside, police become suspicious. Where could the successful chorus girl have gone? S3 Ep3
When the body of a homeless teenager is found behind a hotel, police realise the most dangerous type of killer is on the loose - one who attacks strangers. S3 Ep2
When a sexual assault investigation jeopardises Robert Henry Davies' new life and threatens to revisit sins of his past, a reign of terror begins, culminating in a murder. S4 Ep9
While John George Haigh was in prison for fraud, he came up with a plan for the perfect murder: if there was no body, how could he be charged for killing someone? S4 Ep2
A two year investigation into the random murder of Margaret Wilson, would lead police on one of the most complex and fascinating murder investigations in recent memory. S6 Ep1
Following the discovery of his affair with a much younger woman, police Sergeant Stephen Jones killed his wife Madeline with his truncheon in their garage at home. S7 Ep2
Kirsty Carver worked as a civilian employee of the Humberside Police. One night, she disappeared. Her killer would be revealed as Craig Belcher. S7 Ep1
By day peter Moore was a mild mannered cinema owner. By night he was a self-confessed Mummy's boy who turned to murder following the death of his mother. S8 Ep10
Jean Dicker believed her son Steve was being kind when he moved in following the death of her husband. But when she was found in a seeming robbery gone wrong, tension rose. S8 Ep7
Michael Brown claimed to be a sensitive man, held back by the fact he was only five feet tall. His frustrations at his inability to get a job became murderous. S8 Ep6
Sandra Parkinson was a vibrant young woman filled with potential. Working in Salcombe, her life was ended she was murdered in broad daylight just a few metres from a busy beach. S8 Ep3
Helen Torbet visited the Highlands every year, but over the years the son of its proprietors - Don MacMillan Junior - had developed an unhealthy obsession with her. S8 Ep2
Teenager Clive Olive was a young member of the local biker gang the 'Sussex Mad Dogs'. But after crossing gang leader Brian Moore, he found himself sentenced to death. S7 Ep9
Teenager Clive Olive was a young member of the local biker gang the 'Sussex Mad Dogs'. But after crossing gang leader Brian Moore, he found himself sentenced to death. S7 Ep9
Defending herself against her husband Robert, Hazel Williams bludgeoned him to death. She then proceeded to hide his body in the cellar and told people he had left her. S7 Ep5
Defending herself against her husband Robert, Hazel Williams bludgeoned him to death. She then proceeded to hide his body in the cellar and told people he had left her. S7 Ep5
After Philip Manning shot his ex-wife, Margaret Whitcombe dead in a vengeful rage on Christmas day and hospitalised her boyfriend, he led police on a chase across the country. S6 Ep10
After Philip Manning shot his ex-wife, Margaret Whitcombe dead in a vengeful rage on Christmas day and hospitalised her boyfriend, he led police on a chase across the country. S6 Ep10
After a murderer mistakes a doctor for a vicar, he would proceed to travel the length of the country in search of another man of the cloth to kill. S6 Ep7
Miles William Giffard believed his parents owed him everything, and would stop at nothing to get what he needed for the lavish lifestyle he craved. S6 Ep6
Miles William Giffard believed his parents owed him everything, and would stop at nothing to get what he needed for the lavish lifestyle he craved. S6 Ep6
After eleven days of radio silence, the Mochries were discovered dead in their home on a Sunday evening, in a twisted murder suicide. But police still had to discover why. S6 Ep5
After eleven days of radio silence, the Mochries were discovered dead in their home on a Sunday evening, in a twisted murder suicide. But police still had to discover why. S6 Ep5
Port Talbot taxi driver Linda Thomas made a fatal journey one night in 1973, when she picked up a homicidal homeless drifter called Trevor Howell. S5 Ep9
Port Talbot taxi driver Linda Thomas made a fatal journey one night in 1973, when she picked up a homicidal homeless drifter called Trevor Howell. S5 Ep9