older than Gerry, he is a lot fitter and healthier. At the conclusion of the series, with his son having moved to Australia, Steve decides to get a private investigator's licence and move there himself. Dan Griffin Dan Griffin (Ex-Detective Chief Inspector ) (Nicholas Lyndhurst) (2013–2015): A retired Detective Chief Inspector with experience in both the Murder Squad and the Diplomatic Protection Group, recommended by Brian Lane following his departure. He is a reserved character who can nevertheless provide surprising insights. He is also skilled in self-defence. He is not as outwardly eccentric as Brian, but proves to be just as much of a maverick, and rarely apologises for secrecy. This causes Gerry to initially believe that he has been planted by the Murder Squad for information. He has a disabled teenage daughter, Holly, who enjoys jazz music. Dan's wife Sarah is in a secure unit at a mental hospital – Danny eventually tells Sasha that she suffered a neuropathic condition that caused her delusions, which eventually led to her harming herself, Dan and people in the street. Medication failed to ease her illness and she was committed after trying to drown Holly, who was then aged 13. Although he loved her deeply, Dan had long abandoned hope of ever being with her again, and is thus deeply conflicted when she finally begins to respond to new medicine. Despite this he embarks on a new relationship with Fiona Kennedy, a pathologist whose charm and optimism are matched only by her intelligence. At the conclusion of the series, while initially reluctant to leave Sarah as he is all that she has left, Dan decides to take a new job offer to be a criminal analyst for Interpol, moving to Aberdeen with Fiona. Sasha Miller Detective Chief Inspector Sasha Miller (Tamzin Outhwaite) (2013–2015): Fresh from her role as a DI in the Kidnap Unit, newly promoted DCI Miller is firm, feisty and fair with an inclusive and modern management style. She did not expect such a posting as her first role as a DCI, but she is intrigued by the UCOS success rate. Winning the respect of Gerry, Dan and Steve proves a challenge; she is initially accused by Gerry of doing nothing, and when she reveals that she has been secretly working to locate where a murder weapon was found, the team react angrily at being kept out of the loop.