Series 18
10 episodes
1. Sniper's Nest (1)
1h 0m · Jan 6, 2015
Nikki and Jack strive to track down a sniper at large in London and stem a public crisis.
2. Sniper's Nest (2)
1h 0m · Jan 7, 2015
Nikki and Jack investigate links between the victims to close the net on the killer.
3. Falling Angels (1)
1h 0m · Jan 12, 2015
Nikki and Jack investigate a man killed by a train on the London underground.
4. Falling Angels (2)
1h 0m · Jan 13, 2015
Nikki helps high-flying DI Luke Nelson unearth painful childhood memories.
5. Protection (1)
1h 0m · Jan 19, 2015
A suspected paedophile is found murdered in a children's playground.
6. Protection (2)
1h 0m · Jan 20, 2015
Nikki, Jack and Thomas focus in on Lizzie's movements on the night of Barge's murder.
7. Squaring the Circle (1)
1h 0m · Jan 26, 2015
The nanny of a Russian oligarch is killed in a botched assassination attempt.
8. Squaring the Circle (2)
1h 0m · Jan 27, 2015
A young woman working for the Doshis is found dead in Maksim's apartment.
9. One of Our Own (1)
1h 0m · Feb 2, 2015
The Lyell team are under pressure to catch the killer of an admired Essex police officer.
10. One of Our Own (2)
1h 0m · Feb 3, 2015
When the body of local criminal Jason Simons is found, the course of the case is changed.