Bloodline Detectives

DocumentaryCrime

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

Apr 23, 20206 seasons120 episodesReturning SeriesEN

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Seasons

Season 1

20 episodes

Premiered Apr 23, 2020

Season 2

20 episodes

Premiered Oct 28, 2021

Season3

20 episodes

Premiered Oct 1, 2022

Season 4

20 episodes

Premiered Sep 30, 2023

Season 5

20 episodes

Premiered Sep 4, 2024

Season 6

20 episodes

Premiered Sep 18, 2025

Episodes

1–6 of 20

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Ep 1

Motorway Killer

Apr 23, 2020

In March 2003, a lorry driver was found dead behind the wheel in Camberley, England. Police gambled on the revolutionary technique of familial DNA analysis.

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Ep 2

Unrighteous Act

Apr 30, 2020

In 1976, a woman was left for dead in her home in southern California. Despite a major manhunt, the violent killer avoided detection for over four decades.

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Ep 3

Deadly Desire

May 7, 2020

On Valentines' Day 2007, police in Southern California were called to a particularly violent murder scene. Advances in forensic genealogy finally solved the case.

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Ep 4

Scottsdale Spree Shooting

May 14, 2020

In 2018, two paralegals were shot dead whilst at work in Scottsdale, Arizona. Four more victims were linked to the killing - who was the serial killer?

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Ep 5

Blood Bath

May 21, 2020

In 1984, a young woman's body was discovered in a lane close to her home in Bath, England. How did police eventually track down the perpetrator of this heinous attack?

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Ep 6