Episode 1
Nikki arrives at a murder scene to find it's a carbon copy of a case in her past.
Episode 2
Nikki becomes the prime suspect after a former colleague is murdered.
Episode 3
A young British Muslim returns to the UK, and concerns over her intentions soon escalate.
Episode 4
Thomas must put his personal feelings aside as the team track down Begovic.
Episode 5
An ex-convict is killed and suspicion lands on a recently released child killer.
Episode 6
Further victims are killed and a distinctive modus operandi begins to become clear.
Episode 7
The shooting of a teenager in an armed police operation triggers a series of murders.
Episode 8
Jack leads the hunt for suspected killer Bruno, the brother of the shot teenager.
Episode 9
A family murdered at a picnic leads the team to the female victim's estranged husband.
Episode 10
As Nikki and Jack move closer to the truth, their lives are thrown into mortal danger.
