Series 18

E1 · 60 min

Sniper's Nest (1)

Nikki and Jack strive to track down a sniper at large in London and stem a public crisis.

E2 · 60 min

Sniper's Nest (2)

Nikki and Jack investigate links between the victims to close the net on the killer.

E3 · 60 min

Falling Angels (1)

Nikki and Jack investigate a man killed by a train on the London underground.

E4 · 60 min

Falling Angels (2)

Nikki helps high-flying DI Luke Nelson unearth painful childhood memories.

E5 · 60 min

Protection (1)

A suspected paedophile is found murdered in a children's playground.

E6 · 60 min

Protection (2)

Nikki, Jack and Thomas focus in on Lizzie's movements on the night of Barge's murder.

E7 · 60 min

Squaring the Circle (1)

The nanny of a Russian oligarch is killed in a botched assassination attempt.

E8 · 60 min

Squaring the Circle (2)

A young woman working for the Doshis is found dead in Maksim's apartment.

E9 · 60 min

One of Our Own (1)

The Lyell team are under pressure to catch the killer of an admired Essex police officer.

E10 · 60 min

One of Our Own (2)

When the body of local criminal Jason Simons is found, the course of the case is changed.