Silent Witness Series 21 (2018)

The team investigate the death of a man found in a reservoir. Nikki and Jack deal with the aftermath of their Mexico trip.

Nikki's suspicions about David Cannon are aroused further when she discovers blood in the boot of his car.

A series of tragic events are linked to the hacking of a hospital database and the subsequent blackmailing of patients.

The team wonder if the hack is the only danger as they come under threat. Jack has to decide how to get closure from his experience in Mexico.

A US diplomat is shot dead in central London, forcing the team to work closely with the embassy and the FBI.

When analysing crime scene photos and the positions of the victims' bodies, the team uncover a secret.

After a fatal traffic accident, suspicion falls on a care home resident, but is the suspicion justified?

The team continue to investigate the truth around the care home deaths. Clarissa's determination to find out the shocking truth puts her life in danger.

Nikki, Jack, Thomas and Clarissa are just settling down for their respective festive celebrations when they are interrupted by a call-out to a tragedy at a family home.

With the conclusion of a challenging Christmas, the team are reunited with their families. Nikki learns that her colleagues have bought her a present.