Silent Witness

When a man is thrown from a high-rise building, the team are propelled into the criminal underworld of a notorious mafia group, the Ndrangheta. Aided by the National Crime Agency, Nikki and her team set about uncovering the truth. As they descend deeper into the murky depths of the investigation, Nikki soon finds herself caught in the mafia's web, with deadly consequences.

Nikki becomes even more involved with the Ndrangheta mafia-group and Jack uncovers some disturbing leads. An unlikely alliance leads Nikki closer to the truth, but not without some collateral damage.

An abandoned lorry is found at a quarry with several dead and dying people in the back. Initially, it appears to be a classic sex trafficking story that Nikki and the police are all too familiar with, but it soon becomes clear that all is not as it seems.

The Lyell team work together to find out why the lorry was found with bodies inside and a dead driver at the wheel, and are truly shocked to discover where it leads them. Gabriel becomes emotionally invested and is presented with an ethical dilemma, and Jack gets a surprise visit.

The Lyell team are thrown into the dark side of social media, where nothing is as it seems, and the perfect profiles of the influencers they are investigating raise disturbing questions. As a heavily pregnant DI asks the team for their expertise, are they running out of time to solve this case?

The investigation continues to take unexpected turns, with Nikki managing to get behind the mask of the lead suspect. Jack has a breakthrough at the festival site and Nikki takes a dangerous opportunity. A surprise event at the Lyell brings some hope.

Levelling-up leaders and environmental activists clash in a small town trying to look to the future. With a sabotaged train and a dead mayor, the activists become suspects.

The Lyell team return to the crime scene as another victim is in peril. Family ties are tested to their limits as they reveal the dark secrets that led to the tunnel collapse, and Jack is put in a difficult position when a blast from the past comes to visit.

Jack comes to the aid of an old friend and is sucked into a difficult case where he's pitted against his former mentor. Nikki and the team start to build a picture of what happened.

As the evidence mounts against the accused police officer, the local CID finds dissent within their ranks. The Lyell team unveil corruption and deceit within the local jurisdiction, with deadly and wide-reaching consequences.