investigates a new murder with the same MO, Rachel and Janet come to realize that Geoff is a serial killer, and Veronica was his first, albeit unintended, victim. He stabs and nearly kills Janet while fleeing her home but is later arrested. He pleads guilty to the murders and is sentenced to prison. In the fifth episode of Series 2 Geoff claims to have information regarding fifteen other murders he allegedly committed, but will only talk to Janet. Instead he plays mind games with her, in the process revealing her affair with Andy to Gill. He also states that he made detailed diaries regarding the murders, but refuses to reveal where they are. Rachel, while on a bender, inadvertently guesses that the journals are buried with Geoff's mother, whom he loathed (and is implied to be the motivation for his killing spree). When asked about this Geoff becomes furious, validating Rachel's theory. Helen Bartlett Helen Bartlett (Nicola Walker) appears throughout Series 3 as the daughter of Joe and Eunice Bevan, who molested and murdered young boys for years, burying the bodies in their cellar. In the season premiere Helen becomes a suspect in Eunice's brutal murder, before Joe is found to be the killer. Helen later admits that Joe also killed her brother and forced her to bury the body, but this only results in Helen's arrest for denying lawful burial. Further investigation unearths the bodies of one of Helen's sisters under the floorboards of her parents' bedroom. A statement from the only surviving victim alleges that Helen was a willing participant in the rape, torture, and murder of the boys in the cellar; though this is proven to be untrue, it leads to a harassment campaign against Helen and her partner Louise by both public and press. In the series finale, a drunk and angry Helen takes Gill hostage, but ends up slitting her own wrists and bleeding to death. In Walker's first appearance, in episode one of the third series she looked "immaculate" working on a make-up counter in a department store, however, the veneer fades as her childhood trauma becomes apparent. Neil Simpson Neil Simpson (Gregg Chillin) is a SCAS Detective who appears in the fifth series. He is instrumental in the closing of Rachel's first case as a DI, and the two appear to be friends. References Scott and Bailey