1. Deadhead (1)

7.5

. 7 January 2020. 60 min

The team find unexpected connections between the death of a former US ambassador in a plane crash and the apparent suicide of a successful businessman.

2. Deadhead (2)

7.5

. 8 January 2020. 60 min

The team discover a connection between the plane crash and a sinister online forum. Meanwhile, Matt is grieving for his friend, putting his relationship with Nikki under strain.

3. Close to Home (1)

7.5

. 14 January 2020. 60 min

When the body of a missing teenager is found in a field near his village, Nikki and the Lyell team must determine whether the killer is a stranger or a local.

4. Close to Home (2)

8

. 15 January 2020. 60 min

Investigating the murder of missing teenager Jason Forbes, Nikki and the Lyell team are pressured by police officers who are keen to secure a conviction.

5. Seven Times (1)

6

. 20 January 2020. 60 min

A woman's body is found on railway tracks in London. When the post-mortem reveals signs of domestic violence, it brings back troubling memories for Nikki.

6. Seven Times (2)

7

. 21 January 2020. 60 min

When the team's search for Jenny's killer hits a wall, her friends at the women's refuge seek answers. Meanwhile, Thomas makes some friends in high places.

7. Hope (1)

7.7

. 27 January 2020. 60 min

When a skeleton is found in concrete, the Lyell team must investigate a suspicious death dating back 20 years.

8. Hope (2)

7.7

. 28 January 2020. 60 min

The team's investigation leads them to a mysterious cryogenics facility and the discovery of another suspicious death.

9. The Greater Good (1)

7

. 29 January 2020. 60 min

Thomas performs a post-mortem on a soldier who died in military training. His investigation takes a turn when he discovers traces of a possible nerve agent.

10. The Greater Good (2)

7

. 3 February 2020. 60 min

Jack is rushed to hospital after collapsing at the scene of a car crash. As he fights for his life, the team must identify the poison to save their friend.