This dramatic true crime series reveals how some of the UK’s most serious and complex cases were solved by the expertise of a band of unsung heroes – the expert witnesses.
Episodes Season Series 5 · 0/15 Series 4 · 0/15 Series 3 · 0/15 Series 2 · 0/15 Series 1 · 0/15 0/15 watched · 2026
S05E01 Intent to Kill: The Ashley Dale Murder 2026-07-06 28m
A ballistics expert proves the shooting of a young woman was murder not manslaughter, and a forensic scientist secures justice for a cold case victim, 20 years after the crime. more S05E02 Death on Duty 2026-07-07 28m
A voice analyst makes a positive link to the killer of two police officers, and a lead forensic scientist identifies a phone snatcher from a shoe he left behind. more S05E03 A Deadly Dose 2026-07-08 28m
A forensic toxicologist proves that an Essex couple’s cause of death points to murder, and a footprint expert links a killer to two different murder scenes. more S05E04 The Killer Next Door 2026-07-09 28m
A pathologist and forensic scientist work together to convict the twisted killer of Elaine Collie, and a Home Office pathologist links two suspects to a double homicide. more S05E05 Cold Case Convictions 2026-07-10 28m
An expert witness uses fibre analysis to solve an execution-style murder, and after 26 years in prison, a man walks free when a forensic scientist links DNA to the real killer. more S05E06 The London Bombings 2026-07-13 28m
Forensic explosives experts are tasked with examining the crime scenes after the London bombings to establish if the devices had the signature of any known terrorist organisation. more
S05E07 The Murder of Brianna Ghey 2026-07-14 28m
A blood spatter analyst helps puts the killers of a 16-year-old behind bars, and a forensic speech expert matches a voice on police dashcam to the killer of PC Ian Broadhurst. more
S05E08 The Body in the Cellar 2026-07-15 28m
A forensic archaeologist locates the body of a teenage girl buried in a cellar, and an expert in scanning technology sends a homemade gun maker to jail. more S05E09 Dressed to Kill 2026-07-16 28m
A forensic image analyst identifies a killer from images in CCTV, and a forensic specialist helps police unravel the truth when a case goes from missing to murder. more S05E10 Left for Dead - The Murder of Hilda Murrell 2026-07-17 28m
A forensic biologist uses modern DNA techniques to solve the cold case murder of Hilda Murrell, and cell site analysis helps place a suspect at the scene of Abdul Deghayes’s killing. more S05E11 Grave Evidence - The Murder of Joanna Simpson 2026-07-20 28m
When a man kills his ex-wife, a forensic archaeologist helps determine if it was premeditated murder, and a cell site analyst follows a phone trail that convicts violent bank robbers. more S05E12 Deadly Threads 2026-07-21 28m
A fibre analyst uses a groundbreaking technique to solve the murder of 91-year-old Edwin Hiles, and a forensic fire investigator helps to uncover the truth behind a tragic house fire. more S05E13 Britain’s Coldest Case 2026-07-22 28m
A forensic scientist and a fingerprint expert identify a killer nearly 60 years after the crime, and a plant scientist helps expose a fraudster in a fake tea-growing operation. more S05E14 Death in the Woods 2026-07-23 28m
A forensic biologist works tirelessly to match DNA to the killer of Julia James, and an entomologist links a killer to a double murder. more S05E15 Voice of a Killer 2026-07-24 28m
A skilled voice analyst proves the killer of a missing man is very close to home, and a UK fingerprint expert helps to overturn a miscarriage of justice. more 
