<Tr> <Td_colspan="6"> <P> Nikki's suspicions about David Cannon are aroused further when she discovers blood in the boot of his car . With Thomas's support, she takes samples to process - does it belong to Sally Vaughn? </P> The uncovering of a family murder from the past shines the spotlight on three people who went to the same school . </Td> </Tr> <P> Nikki's suspicions about David Cannon are aroused further when she discovers blood in the boot of his car . With Thomas's support, she takes samples to process - does it belong to Sally Vaughn? </P> <Tr> <Th> 185 </Th> <Td> "Duty of Candour − Part One" </Td> <Td> Matthew Arlidge </Td> <Td> Destiny Ekaragha </Td> <Td> 15 January 2018 (2018 - 01 - 15) </Td> <Td> 8.86 </Td> </Tr> <Tr> <Td_colspan="6"> Nikki and Jack deal with their feelings post Mexico in very different ways . Jack is boxing with his sparring partner, DCI Naomi Silva when he is called to a crime scene . While Nikki is busy examining the body of a young woman Karen Sawyers, Jack is surprised to find the SIO on the case is Naomi Silva . The first prime suspect, Karen's husband Pete, is found covered in blood and clearly suffering . The forensic evidence leads the team to a cosmetic clinic, where a pregnant Karen had been receiving various treatments seemingly free of charge . Nikki and Silva soon become frustrated when Simon Laing, the CEO of Hamilton Ashe hospital, blocks their access to Karen's medical records . However, when a second body is found and all evidence leads back to Hamilton Ashe, Laing is forced to help the team . Meanwhile, when Thomas's daughter Rosie unexpectedly turns up at the Lyell, Thomas has to deal with a more complex role...being a father . </Td> </Tr>

When will second part of silent witness be shown