Silent Witness

When a boat carrying illegal passengers is found crashed in the Thames, the team investigate.

The team follows the trail of the people traffickers, and has to find any remaining survivors before a highly contagious disease breaks.

Harry investigates a hit and run accident on a rundown council estate while Leo is drawn into the case of a woman killed in a terrible and suspicious fire at her house. Nikki examines a woman who collapsed and died on her hen night.

The pathologists investigate the death of a man found on a night bus, an office prank gone wrong, and a professional footballer's suicide.

Harry is shocked when his former university girlfriend, Penny Harris, is brought in dead. She drove her car into a tree and the police initially suspect suicide but the autopsy reveals that the medication in her system was ground rather than in pill form, so they conclude she was likely murdered. Her husband tells the police that he thought his wife was having an affair and her parents react strangely to the news. Leo assists the police in the death of Jimmy Triangle, a conceptual artist whose latest work dealt with the death of conceptual art - and includes his own ...

Nikki and Harry continue to investigate the death of Penny Harris. Harry is shocked to learn that she had apparently at some point in her life had a child but her husband denies any knowledge of such. Another death in the Harris family allows them to narrow the suspects and identify the killer. Leo continues to look for clues and the police think they have solved the case through fingerprint evidence, but Leo is able to prove that the suspect has been framed. The victims penchant for videotaping his activities provides a vital clue.

Alison Garland is a 14 year old schoolgirl found dead on the school grounds just after lunch. She appears to have slit her wrists and committed suicide, but there is also evidence that she had sexual relations just earlier that day. As Leo Dalton looks into the case he learns that Alison was also a school bully and was a very unhappy young woman. Harry assists the police in the stabbing death of a car dealer. The evidence suggests that he was stabbed in his garage and his body then dumped. The case takes a radical twist when they find that the knife found by Alison's ...

A third murder is discovered on school grounds and Leo realises the killings are connected to a sinister teenage pact. Meanwhile, Nikki proves her elderly victim died of hypothermia - but there is still a guilty party to be caught.

Harry and Nikki are called out to a London dogs' home where the naked body of a teenage girl has been found tortured to death.

Harry finds himself in the middle of a high-level, dangerous cover-up and Lionel's hearing continues.