Expert Witness
Expert Witness is a TV show on BBC1. 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. Gripping true crime stories. The program has been available since 2025. A total of 28 episodes have been broadcast, most recently in April 2026.
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Expert Witness
In a case of mistaken identity, a man is stabbed to death. An intelligence analyst helps convict the killers, and a trace evidence expert helps find the weapon used to kill a teenager.
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Untying the knot of a dressing gown cord used to kill a woman in 1984 finally reveals the perpetrator. And expert analysis of muddy shoes helps find the murderer of a missing student.
When a killer gang use a secret language to discuss an attack, police turn to a forensic linguist. And a huge cannabis operation is brought down with the help of a drugs expert.
When a body is found in a wheelie bin in a lake, a cell site analyst tracks the suspects’ mobile phones. And when a man disappears, a soil expert helps identify his killers.
When eight-year-old Sarah Payne is murdered, a pollen expert finds a vital link between the suspect and the grave. In another case, a blood spatter expert is called when a body is found in a freezer.
Series 1
A 50-year-old cold case murder is solved by DNA and the tenacity of an expert witness, and a murder investigation is solved by tracking unusual blue fibres around the world.
How expert analysis of nettles and soil helped catch the killer of the Soham schoolgirls, and how advances in DNA techniques solved the murder known as the Beauty in the Bath.
Analysis of text messages reveal a husband’s plot to cover up his wife’s murder, and traces of DNA on decades-old evidence help bring justice to the family of a murdered woman.
A wrongful conviction is overturned by re-examining microscopic particles on a van seat, and an attempted murder outside a nightclub is solved by a facial comparison expert.
A body left in a field prompts the examination of pollen, establishing a new forensic discipline, and fibres fused with car wreckage prove who caused a fatal traffic collision.
After 32 years, expert fibre analysis helps bring the killer of two Brighton schoolgirls to justice, and the analysis of bones found on a Yorkshire moor helps find two killers.
Soil on a spade helps catch the killer of a young woman from Swindon, who for years evaded justice and a stone stuck in the sole of a shoe helps solve a murder in Manchester.
Marks left by the tread of a shoe help detectives catch a killer terrorising Rochdale, and a forensic linguist deciphers messages written in slang, revealing a murder plot.
Blood traces hidden under paint allow an expert witness to find a killer and free five men from suspicion. An unusual gait identifies the murderer of an office worker.
Soil analysis helps solve a 37-year-old murder investigation in Scotland. In Huddersfield, analysis of insect life on a body found on the moors helps detectives catch a killer.
Series 3
When two men are wrongly convicted of murder, a forensic blood spatter analyst helps to prove their innocence.
When a woman is the victim of an acid attack in Brighton, an expert pieces together hours of CCTV footage to identify the suspect.
When a 21-year-old student is murdered and dumped in the Humber Estuary, a forensic biologist helps police bring her killer to justice.
When the body of a farmer is found in a lake, a bioarchaeologist helps police reveal how he got there.
When a dismembered body is discovered, police turn to a facial reconstruction expert to help identify the victim.