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.

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.

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.

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.

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.

The investigation remains full of surprising twists and turns, with Nikki managing to get behind the mask of the main suspect; at the festival site, Jack has a huge breakthrough

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.

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

The local CID suffers from a difference in opinion as evidence mounts against the accused police officer; the Lyell team uncovers corruption and duplicity within the local administration.