Emilia looks into the killing of Martin Decker, who had been bludgeoned with a hammer. Police would link the murder to a suspect dubbed the NR3 cat killer.

Joan and John Stirland, a couple in their fifties living on the Lincolnshire coast, were found murdered in 2004. The investigation into the deaths eventually led to the downfall of one of Nottinghamshire's most feared underworld figures.

Emilia investigates Evie Adams' murder in 2019. The victim's boyfriend, who was already being investigated over two separate deaths, quickly came under suspicion.

In this episode explores how one boy left an entire city living in fear. Aged 15, Robbie Mcintosh walked into a fish & chip shop to announce that a woman had been killed on the iconic Law Hill. Locals were terrified as the news spread. Police revealed the victim had been stabbed dozens of times. But police never imagined that the culprit was a 15 year-old. As cops swooped to arrest him, Mcintosh fled to Glasgow airport, buying a ticket to Canada when he was placed under arrest. Was Mcintosh a local youth who had committed something shocking, or a serial killer in the making, stopped in his tracks? Dundee would find out in 2017, when Mcintosh was allowed out of prison on home leave. He lasted 5 days. Then he took a walk into nearby woods, spotted a female dog walker, and attacked her with a large heavy dumbbell. The woman survived, and police arrested Mcintosh just an hour later. In Dundee, lightning had struck twice terrifyingly, Mcintosh will be eligible for release in 2022.

Rachel Manning had been to a 1970s-themed fancy dress party and Chicago's nightclub with boyfriend Barri White before going missing in the early hours of 10 December 2000. The teenager was found dead in undergrowth at Woburn Golf Club two days later. She had been strangled and her face disfigured with a steering lock, which was located 500m (546 yards) from her body.

1994 an evil gang kill a woman who manages a building society and tie up her husband, before robbing the building society of large sums of cash. Cops are baffled. But something doesn't quite add up. Despite making a tearful plea for help, the injured husband's story doesn't tally. Cops soon start to suspect that the ‘gang' are a hoax, and that Gordon Wardell has murdered his wife Carol in a bid to get money.

Emilia uncovers details surrounding the brutal murder of Rosie Darbyshire. Witnesses and CCTV were key to solving the case that shocked the local community.

In 2015 a man visits a tarot card reader. Within an hour she's dealt out the death card and he's confessed to a murder. When cops arrive they discover he's been living at home with his victim's body for days. Both men are a part of the spiritualist church - and have fallen out in the biggest way possible. Cops have the grim task of investigating the crime, and proving the death is a murder. This episode taps into a series of crimes with same-sex partners committing murder in the city and living with their victims, and we tell the story of a second crime, with very similar outcomes, that saw a man go on the run for a year.

Emilia examines three murders which shook Beenham in the 1960s. One of the murders went unsolved for 40 years, until detectives vowed to finally seek justice.

In May 1996, the murder of Stephen Cameron hit national headlines as one of the first examples in the UK of a road rage killing.

In 2014 a sex offender called Robert Hind goes missing from a bail hostel. Cops fear he's absconded to commit crime. The town is scoured. Then cops find CCTV of the man with another ex-con called David Mitchell at the bus station. They find out the two men are friends, who live together at the hostel. Rumour has it they are in a relationship together. They fear the two men have gone to do something terrible. But then they learn that the sex offender hadn't absconded, he's been murdered, by Mitchell, the man with him on CCTV. Mitchell has killed before – murdering his wife in the 90's. Now he's killed paedophile Hind, and dumped him in the canal. It's a canal that contains many dark secrets, as we also see from the story of Tobias Minski, a student in Huddersfield who disappeared and sparked a town-wide search, before his body was found folded up in a suitcase beside the canal.

In 2000 a young woman is stabbed to death while walking her dog in a picturesque park in the town. She's a twin, a woman known in her local area. A suspect is seen running semi-naked across the M1 motorway and makes his escape. Cops initially suspect the killer of Rachel Nickel might be responsible...and it takes detectives weeks to identify the real killer is a local man called Leon Amos. They find out his family are known criminals, who have been covering Leon's tracks, and that the killer may have mistakenly carried out an act of retribution on the wrong twin.

In Middlesbrough we look at the story of a man who believed he had committed the perfect murder, and how diligent police work uncovered his identity and his plans for further violent crimes.

This is the shocking story of Julie Paterson's tragic murder, and the gruesome details of the attack which shocked the local community and drove her partner to drastic measures.

The brutal murder of 17-year-old student Zoe Nelson in North Lanarkshire in 2010 - and the twists and turns of the trial that followed.

In Bristol, we hear from the parents of Louise Smith, who woke on Christmas morning 1995 to find their daughter had not returned from a night out the previous evening, as they discuss the events surrounding her disappearance and their desperate need for answers.

This episode explores two terrible crimes that left a lasting impression on Hull - and reveals how complex investigations into one case finally led to both mysteries being solved. The story begins with the apparent kidnap and murder of Christopher Laverack, a crime that initially had police stumped. It would remain unsolved for years. We also tell the story of the disappearance of Joanne Nelson, who vanished from the city on Valentine’s Day, 2005. It was a story that had the whole city on edge and led to the biggest search in Humberside Police history, before a breakthrough led police to finding her killer, and the whereabouts of her body.

This episode explores one man's violent rampage through the town of Wrexham, which eventually led to the murder of Nicholas Churton.

Airing as a part of domestic violence awareness week - this film tells the dramatic and shocking story of Mario Celaire - a man who viciously assaulted two women he claimed to love.

Pennie Davis'body was found with multiple stab wounds in a field where she rode her horse in the village of Beaulieu on 2nd September 2014. The case centered on Mrs. Davis' relationship with Benjamin Carr, 22, the son of her estranged partner, who had "lasting hate and anger" towards her. Mrs Davis had reported Carr to police for two sexual assaults, which he denied and the matter was not taken further by police. Animosity resurfaced in 2012, however, when Mrs. Davis found out Carr's father was to re-marry and Davis threatened to disrupt the proceedings by going public with her allegations. Carr hatched a plan to pay career criminal Justin Robertson £1,500 to 'silence her for good.' Police believe Robertson intended to scare Ms. Davis, but when she challenged him and removed his balaclava, he panicked, realised she could identify him and killed her. Both Carr and Robertson were charged with the murder and found guilty.

Examining two murders committed in Portsmouth on Dec. 12 of different years by Allan Grimson, and possible links to the disappearance of Simon Parkes.

In Nuneaton, we hear from David Freeman, who's younger sister Naomi Smith was tragically murdered on her way to post a letter, as he tells us of the family's quest for answers about who could have done this to her.

Throughout the early 90s young boys would be found dead after sniffing glue and being trapped in derelict buildings which caught fire. But when it kept happening, cops got suspicious. They soon found they were actually being systematically murdered by a man called Steven Grieveson, dubbed the Sunderland strangler in a case which still haunts the town. His is a name few will know, but he's regarded as one of the most dangerous killers in the UK.

When a murder is committed, you hope that the suspect is caught as quickly as possible, but in the case of Elaine Doyle's murder in Greenock, a lack of evidence meant that justice would not be served for several years, until advancements in technology made it possible.