About this season
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 (15)
1. Soil and Insects
Aired 25 October 2021 • 29 min
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.
2. Blood Under Paint and Gait
Aired 26 October 2021 • 29 min
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.
3. Forensic Imaging and MSN Chat
Aired 27 October 2021 • 29 min
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.
4. Fibre Trails and Diamonds
Aired 28 October 2021 • 29 min
A team of expert witnesses follow a trail of fibres and DNA to solve three cold cases in Pembrokeshire, and a fraudulent diamond investment scheme is exposed by a gemologist.
5. Pollen in a Field and Fibres in a Car Crash
Aired 29 October 2021 • 29 min
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.
6. DNA, Fibres and Bones
Aired 1 November 2021 • 29 min
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.
7. Aging Insects and Fake Fairies
Aired 2 November 2021 • 29 min
Insect evidence helps crack the case of missing Warrington teenager Shafilea Ahmed, and a series of convincing John Anster Fitzgerald forgeries are uncovered by an art expert.
8. Soil on a Spade and Stones in a Shoe
Aired 3 November 2021 • 29 min
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.
9. Cerium and CCTV
Aired 4 November 2021 • 29 min
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.
10. Pollen, Bones and DNA
Aired 5 November 2021 • 29 min
Pollen and bone experts help identify the remains of a murder victim found in a sports bag. And advances in DNA help find the killer of a Bradford pensioner after 22 years.
11. Text Messages and DNA
Aired 8 November 2021 • 29 min
Analysis of text messages reveal a husband's plot to cover up his wife's murder and traces of DNA on decades old evidence helps bring justice to the family of a murdered woman.
12. Pollen, Chalk and DNA
Aired 9 November 2021 • 29 min
How expert analysis of nettles and chalky soil helped catch the killer of Soham schoolgirls and how advances in DNA techniques finally solve the murder known as Beauty in the Bath
13. Insects and Bones
Aired 10 November 2021 • 29 min
Insects establish an accurate time of death, helping to prove a husband killed his wife and analysis of burnt remains in Leeds, uncovers another husband's cold murder of his wife.
14. Paint Materials and Blood Patterns
Aired 11 November 2021 • 29 min
Forensics analysis by an art expert prove paintings by a well known cornish artist are fake, and blood spatter patterns in a hotel bedroom, help catch the killer of a father of 3.
15. 60's DNA and Fibres Around the World
Aired 12 November 2021 • 29 min
A fifty 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.