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.
Expert Witness (Season 5)
Intent to Kill: The Ashley Dale Murder (Episode 1)
Air date: 2026-07-06
Runtime: 28 min
Overview: 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.
Death on Duty (Episode 2)
Air date: 2026-07-07
Runtime: 28 min
Overview: 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.
A Deadly Dose (Episode 3)
Air date: 2026-07-08
Runtime: 28 min
Overview: 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.
The Killer Next Door (Episode 4)
Air date: 2026-07-09
Runtime: 28 min
Overview: 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.
Cold Case Convictions (Episode 5)
Air date: 2026-07-10
Runtime: 28 min
Overview: 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.
The London Bombings (Episode 6)
Air date: 2026-07-13
Runtime: 28 min
Overview: 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.
The Murder of Brianna Ghey (Episode 7)
Air date: 2026-07-14
Runtime: 28 min
Overview: 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.
The Body in the Cellar (Episode 8)
Air date: 2026-07-15
Runtime: 28 min
Overview: 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.
Dressed to Kill (Episode 9)
Air date: 2026-07-16
Runtime: 28 min
Overview: 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.
Left for Dead - The Murder of Hilda Murrell (Episode 10)
Air date: 2026-07-17
Runtime: 28 min
Overview: 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.
Grave Evidence - The Murder of Joanna Simpson (Episode 11)
Air date: 2026-07-20
Runtime: 28 min
Overview: 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.
Deadly Threads (Episode 12)
Air date: 2026-07-21
Runtime: 28 min
Overview: 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.
Britain’s Coldest Case (Episode 13)
Air date: 2026-07-22
Runtime: 28 min
Overview: 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.
Death in the Woods (Episode 14)
Air date: 2026-07-23
Runtime: 28 min
Overview: A forensic biologist works tirelessly to match DNA to the killer of Julia James, and an entomologist links a killer to a double murder.
Voice of a Killer (Episode 15)
Air date: 2026-07-24
Runtime: 28 min
Overview: 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.
