E1 - Sniper's Nest (1)

Aired: January 06, 2015

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

E2 - Sniper's Nest (2)

Aired: January 07, 2015

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

E3 - Falling Angels (1)

Aired: January 12, 2015

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

E4 - Falling Angels (2)

Aired: January 13, 2015

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

E5 - Protection (1)

Aired: January 19, 2015

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

E6 - Protection (2)

Aired: January 20, 2015

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

E7 - Squaring the Circle (1)

Aired: January 26, 2015

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

E8 - Squaring the Circle (2)

Aired: January 27, 2015

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

E9 - One of Our Own (1)

Aired: February 02, 2015

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

E10 - One of Our Own (2)

Aired: February 03, 2015

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