Episode 1 | Episode #2.1

Police find the bodies of two young women in a freezer, possibly lured to their death by the same murderer. Will forensic analysis of the evidence help identify the killer?

Episode 2 | Episode #2.2

Beginning with a body found in a ditch by a dog-walker in 2013, a serial killer investigation takes on a new dimension of importance after two more attempted murders are reported.

Episode 3 | Episode #2.3

When a carer finds a vulnerable man dead in his bedroom surrounded by blood splatter, authorities declare a crime scene and begin an investigation but run into difficulties as they are confronted by clear signs of a thorough clean...

Episode 4 | Episode #2.4

When a motorist finds a foul-smelling suitcase they call the police. But the corpse within proves difficult to identify until the authorities make a breakthrough.

Episode 5 | Episode #2.5

After a 17-year-old is found dead in the kitchen of her own home, the forensic team's first lead is that there has been a sloppy attempt at clean-up where the murderer has poorly tried to stage the death as suicide.

Episode 6 | Episode #2.6

Police officers respond to reports of violent disorder in a south London residential street involving a large group wielding axes, knives and lumps of wood, attacking cars and people.

Episode 7 | Episode #2.7

Only yards away from her home in Rochdale, 65-year-old Eileen Jawczak is found brutally murdered. But despite an extensive forensic recovery, CSIs cannot uncover any promising leads.

Episode 8 | Episode #2.8

After a brutally murdered oil rig worker is found in a burnt-out car, a quiet Scottish town soon becomes inflamed with rumours and fear.

Episode 9 | Episode #2.9

A university lecturer's murder, stabbed to death in a park, marks the start of a killer's reign of terror as more stabbings follow - with authorities scrambling to respond.

Episode 10 | Episode #2.10

Dental records show a corpse's identity to be a woman who supposedly died over three years ago from a brain aneurysm.

Episode 11 | Episode #2.11

A boy out on his bike is stabbed by a random stranger with the blade breaking off in his chest, leaving authorities to search for his assailant.

Episode 12 | Episode #2.12

Police respond to what seems to be a hit-and-run leaving three men critically wounded, but while teams begin to gather evidence one dies in hospital.