14/15. A dentist's expertise in forensics helps police to connect a man to the disappearance of his wife. And a soil expert helps to bring convictions against three heritage thieves. Also in HD. [S]
12/15. Detectives hunting the killer of a young woman from Bolton require the help of a fibre and DNA specialist to arrest their suspect. Also in HD. [S]
7/15. An expert witness helps police link a drug gang to the death of a Vietnamese man in Wales. And DNA experts gather evidence that identifies the killer of a man from Bristol. Also in HD. [S]
4/15. When a woman is the victim of an acid attack in Brighton, an expert pieces together hours of CCTV footage to identify the suspect. Also in HD. [S]
3/15. When a 21-year-old student is murdered and dumped in the Humber Estuary, a forensic biologist helps police bring her killer to justice. Also in HD. [S]
8/10. A DNA expert witness helps solve a 50-year-old crime, a murder investigation is solved by tracking unusual blue fibres around the world, and forensic anthropology is explored. Also in HD. [S,AD]
7/10. Text message analysis reveals a shocking crime, and DNA on old evidence catches a killer. Soil science and the first murder case solved using DNA evidence are also explored. Also in HD. [S,AD]
5/10. DNA and an expert witness solve a 50-year-old cold case, a murder is solved by tracking unusual fibres around the world, and how to preserve and examine a crime scene. Also in HD. [S,AD]
4/10. Blood traces hidden under paint help an expert witness overturn a miscarriage of justice, an unusual gait identifies a killer and the science of fibre evidence is explored. Also in HD. [S,AD]
13/15. An expert in mobile phone technology tracks the movements of a murder suspect, and an expert in art fraud determines whether a very expensive painting is genuine or fake. Also in HD. [S,AD]
9/15. An expert in microscopic lifeforms helps solve the murder of a teenager, and a handwriting expert assists an old lady whose house has been sold without consent. Also in HD. [S,AD]
4/15. 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. Also in HD. [S,AD]
3/15. 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. Also in HD. [S,AD]
2/15. 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. Also in HD. [S,AD]
7/15. 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. Also in HD. [S]
6/15. 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. Also in HD. [S]
5/15. 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. Also in HD. [S]
4/15. 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. Also in HD. [S]
3/15. 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. Also in HD. [S]
2/15. 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. Also in HD. [S]
1/15. 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. Also in HD. [S]