(Danny Miller) is a young, fast-tracked Detective Sergeant who was hired after Janet insisted she didn't want a promotion following Andy's departure. He is shown to be a decent officer, but lacks the confidence and leadership skills of Gill, causing the team to make fun of him at times. He also has a slightly flirtatious relationship with Janet, which Rachel exploits by sending him a sexually-suggestive e-mail using Janet's account; although she intends it as a joke, Rob is embarrassed enough to report it to Gill and Janet is infuriated. As part of his fast-track career progression, Rob leaves the MIT early in Series 4 for a sex crimes unit, leading to Rachel being promoted to DS. In his career, Rob was following in the footsteps of his father, whose competence is called into question when an old case is reopened during Rob's last week with MIT and leads Rob to clash with Rachel during the course of the investigation. Julie Dodson Julie Dodson (Pippa Haywood) is head of Syndicate 3 and close friends with Gill Murray. Kevin used to work for her until he was moved to MIT, and he harbours a deep resentment. Haywood joined the cast in the second series, notably when handling the inquiry into the murder of Nick Savage, and becomes more prominent in the latter half of Series 3 when asked to lead the Helen Bartlett case. Noting the character's close relationship with Gill, Haywood stated, "I like the double act between Julie and Gill Murray. When they are at work they have this reputation that they are fearsome; a force to be reckoned with, but there's also a lot of humour between them". Late in Series 4 Dodson is asked by Janet to investigate allegations that Gill is drunk on the job, putting a deep strain on their friendship when Gill's ability to lead the MIT is called into question. Following Gill's departure, Dodson assigns a series of temporary SIOs to Syndicate 9, staffed exclusively by Constables. She later promotes Rachel into the position of Detective Inspector. Supporting cast and characters Overview Nick Savage Nicholas "Nick" Savage (Rupert Graves) was a wealthy barrister and Rachel's ex-lover. After he abruptly breaks up with her in the first episode, she abuses her police resources to track him down, discovering he was in fact married with two sons. He had an apartment in the city centre,