After a preserved female body is discovered buried in a peat moor in Sheffield, DI Sonia Hardwick turns to an archaeologist called Professor Patrick Cain for help. Nikki discovers knife wounds to the hands which the professor believes may indicate a ritual killing as the autopsy on the body is carried out. Further wounds discovered around the abdomen and genitalia suggest though that it could of been a sexually motivated attack. Leo ends up searching through his archives for a case he dealt with in Sheffield in 1985 that were committed by self-confessed serial killer Karl Bentley. As he examines the body himself he is caught by Nikki and Leo tells him he thinks the body could belong to a woman called Jodie Fisher who went missing at the time. When Leo pays a visit to Sheffield he is haunted by memories of his own past which put a strain on his relationship with Janet. Another girls ends up being killed on the streets of Sheffield.
Nikki is called to perform a post mortem on the body of a woman found in a river, and the discovery that she had recently given birth causes the pathologist to worry her child may be abandoned somewhere. Meanwhile, Harry investigates the apparent suicide of a lieutenant at a nearby Army base, and suspicions soon arise that the two cases may be linked.
An X-ray of Lt Lockford's skull reveals a second bullet, confirming suspicions that he was murdered. Danny Ferris's father is not satisfied with the verdict on his son's death, and asks Nikki to perform a second post-mortem, and as the investigation continues to unravel, a tragic secret is revealed at Hillsdon Army Base.
Harry is reunited with Anna Sandor when she calls him to Budapest to perform a second post-mortem on the body of a drowned prostitute, Sofi Mustafova. As they get reacquainted, Anna tells him she believes the death is suspicious and may be linked to her own investigations into the disappearance of other pregnant prostitutes. The women's body ends up being cremated before Harry can take a look at it. Harry's world is crushed when he finds out that Anna has been stabbed to death in her bed. He is forced to go underground where he manages to make a desperate call to Leo in London for help when he becomes the number one suspect. Harry continues with the investigation into the gang-run prostitution racket. When Leo shows up late for the meeting with Harry he witnesses a man being shot and burned. When he manages to retrieve a charred passport from the body it turns out to be Harry's.
Nikki makes her way to Budapest but there's not much she or Leo can do as every move they make is being watched by Tibor Orban. Leo manages to secretly meet Nikki where he reveals that Harry is still alive. Harry explains why he had to fake his own death and continues that he must find out why Anna was killed and unravel the dark secret of the prostitution racket.
Chief Inspector Rebecca Woods and some members of the Diplomatic Protection Group head to the Dutch embassy to investigate a shooting. They disscover Ambassador, Pieter Van Buren, holding his wounded daughter Klara. He demands that the the DPG team leave and Woods has no choice but to agree given it is officially Dutch territory. After Pieter leaves the building, carrying Klara, he informs the police that his grandson, Jack, is missing. DPG Sergeant Whitehead is found shot in the bulding after the polive go in. Pieter is scared that history could be repeating itself as his own son, Jacob, went missing from the family home in 1996 and was never seen again. When Klara begins to recover in hospital, her memory comes back and she remembers who carried out the shootings.
Harry discovers evidence of extensive plastic surgery on the corpse of the bodyguard as an autopsy is carried out. He also manages to locate the missing boy, Jack Van Buren, who is hiding in the basement of the Embassy. Nikki takes a look at the evidence from the 1996 disappearance of Jacob and learns that a DNA sample from Pieter's dead brother, Diederick, matches the profile of the dead bodyguard. The Van Burens' version of what happens becomes increasingly unlikely and when the body of the family's au pair, Mary Olivant, is found hanged near the Van Buren family home, Leo discovers the remains of a young boy in the ground. Klara ends up confessing that she was responsible for the shootings.
Harry is disturbed to be called to a crime scene at the home of a family he knows, and finds the bodies of the mother and her teenage daughter, while her stepson lies in a coma - although her toddler has been left unharmed. The police suspect the woman's husband to be the killer - but the pathologist is not so sure of his guilt. The double-murder investigation reveals more about the tangled lives of the inhabitants of Magnolia Drive
Serial killer Arnold Mears Eenjoys poetry but has no remorse for violently killing three teenagers. He has been busy for the last five years sending Annie, a desperate mother of a missing girl, on secret hunts to try and find his hidden victims.Annie’s son Andy, upset at Mears’ manipulation of his mother, ends up turning to Nikki for help. Leo manages to get himself into tropuble with the team after he re-examines a case by Nikki’s old mentor, Dr. Helen Karamides.
Nikki manages to track down the original detective on the case, Detective Inspector Gladwyn ans she looks around the church that killer Arnold Mears used to attend as a boy. Mears is not happy that the police have been made aware of the undiscovered bodies and he says that he is prepared to reveal where he has hidden them to Nikki.
Leo is determined to learn the circumstances about the death of Eve Gilston. Nikki and Harry manage to find the nun who performed the exorcism but are surprised by what they find. Eve’s mother Beth Gilston is confronted by Leo and che omes close tod iscovering the truth about what actually happened the night before her daughter died.
When John Briggs, a wealthy business owner, is found dead, Nikki works with forensic scientist Jack Hodgson to convince DI Gold it was murder. Leo, warned by the Home Office to rethink the Lyell Centre's operations, helps Nikki prove Briggs died from a mysterious allergic reaction. However, as suited sharks circle to buy Briggs' ailing company, Jack believes someone exploited this allergy to kill. Briggs' estranged daughter Geraldine is left the company in his will, yet she is shocked that he had tracked down her long lost daughter Deanna, and the pair make up for lost time. But when Deanna's body is discovered in the Thames, Nikki, Jack and DI Gold are sure the murders are linked, as Leo decides how to safeguard the Lyell Centre's future - employing Jack to launch a forensics department. As the new team are cemented, evidence from Deanna's body provides a vital lead on the killer's motive.
Whilst Nikki, Leo and Jack struggle to ascertain how Deanna was killed and ended up in the Thames, DI Gold focuses on two main suspects in John Briggs' inner circle. However, when Geraldine makes a sinister confession about why she gave her daughter up for adoption and disowned her wealthy family, it dramatically changes the course of the investigation. With the family's skeletons in the closet now exposed for all to see, the future of the ailing company hangs precariously in the balance. But when a third murder victim is found, it gives the team the forensic evidence to unravel the mysterious motives and smoke out the killer.
The case of two young women shot dead in a house basement forces Jack to lock horns with an old flame, the ambitious DI Chrissy Reed. As the pair's animosity rapidly escalates due to their conflicting motive theories and failure to ID the victims, Nikki's probing unearths the potentially career-damaging truth behind it. Meanwhile, Leo wrestles with providing a second post-mortem on a baby suspected of being abused and smothered to death by his mother, Shona. The father, Mark, is adamant she is innocent. He pleads with Leo to find an alternative cause for their son's fractures and death to free his wife before their other son, Darius, is adopted. However, Leo soon realises that to achieve this he must re-examine the work of his pathologist friend, Richard Fell, and prove he made a mistake in his evidence against Shona.
As the basement women case highlights two cooperating killers, Nikki, Jack and DI Reed realise one victim was killed by a controlled sedative, stolen from a high-tech vaccine research lab. And suspicion falls on Lucas Ballinger, a scientist who works there. Meanwhile, Leo draws a blank with his theory that Shona's baby died of natural causes, but when he discovers Mark's violent past, Leo fears Shona may have taken the rap for her partner's child abuse. Jack makes a chilling forensic breakthrough which exposes a dangerous plot to breach national security, leaving the Lyell Centre paralysed by a government-imposed lockdown. With Nikki, Jack and DI Reed locked in a race against time to find Ballinger and prevent mass casualties, Leo has one last shot at proving that Shona's baby died from natural causes in a desperate bid to reunite her and Mark with their other son before he is adopted.
When a pub landlady is stabbed to death and her little finger cut off, her husband, Roly, is the prime suspect. However, as Nikki, Jack, and emotionally fragile detective, DI Kate Warren, piece together mounting evidence, inconsistencies lead Nikki to believe Roly's innocent. She's desperate to reunite him with his traumatised daughter, Emma, who faces a life in foster care if her father is imprisoned. Isolated in her quest to prove Roly's innocence, Nikki is defeated when Roly is charged with murder, and about to lose his daughter forever. But when Nikki and Leo unearth several old murder cases where the victims' fingertips were cut off, they begin to suspect Roly is the new target of a serial killer. The spotlight soon falls on ex-cop Alan Lane, who served eight years for killing his wife, Imogen, despite her body never being found, only her severed fingertip.
When arrested and interrogated by DI Kate Warren, Alan Lane vehemently protests his innocence and insists he never killed his wife Imogen, but when Jack and Nikki fail to get concrete evidence in time to charge him, Lane walks free. However, when the team finally unearth the shocking truth about Imogen's murder, it exposes a web of lies and deceit which puts those connected to the case in imminent danger from the sinister Alan Lane. As their fears about the ex-cop intensify, Nikki and Jack must swerve the sceptical police and piece together their evidence to build a water-tight case against Lane fast, in order to prevent more innocent lives being lost.
Nikki and Jack are under pressure when a teenager's remains halt an eco-housing project, while Leo is trapped in a dangerous hospital siege as distraught Tom Hancock holds a ward at gunpoint to turn off his terminally ill son's life support. Leo agrees to do his son's post-mortem to diffuse the situation, and becomes embroiled in Tom's quest for the truth behind his son's cancerous tumours. When Leo discovers that Tom's son had the same kidney disorder as the housing project victim, he suspects a dangerous local health hazard. Far from convinced, Nikki enjoys a whirlwind romance with charismatic science minister James Embleton, the eco-housing project owner, despite his belligerent father's discomfort. New construction site evidence leads Jack to builder Brian Blackburn, with suspicion falling on his son, who has sudden behavioural problems. And as Leo's investigation into a health hazard hits another barrier, he becomes convinced he is onto a cover up.
Whilst Nikki and Jack close the net on Brian Blackburn's troubled son for murdering his co-worker at the eco-housing project, Leo finally finds someone willing to confirm his fear about the mysterious local health hazard. But when his would-be-informant is found murdered, Leo is convinced he was the victim of a government conspiracy to conceal the truth. And during his dogged efforts to expose the cause of the health hazard, Leo begins to suspect that Nikki's new man, science minister James Embleton, and his belligerent father, may be linked to a ruthless plot to silence him, which leaves Leo battling alone to seek justice and save future lives.
British Army Corporal Scott Lambert requests Leo's expertise in identifying human remains unearthed in Afghanistan, believed to be those of his brother Daniel, who went missing in action five years ago, suspected of being captured by the Taliban. Anxious Leo, Nikki and Jack head for the war-torn country in search of the truth about the soldier's mysterious disappearance. Staying in a compound by a small town with ex-military security officer Sean Nugent and his detail, the team discovers that there is far more at stake than simply identifying a soldier's remains. The crime scene is preventing the completion of a vital charity water sanitation plant project, spearheaded by inspirational Afghan charity worker Fawzia Joya. And although initially understanding of the team's mission, when ruthless Taliban attacks begin to threaten their investigation, she fears the construction delay will jeopardise the project's completion, putting thousands of Afghan lives at risk from contaminated water.
Nikki, Jack and Leo struggle to identify the human remains with only sections of skeleton found and basic forensic facilities, but believe Dan Lambert must have been captured by the Taliban, executed and buried. Whilst Leo grows closer to charity worker Fawzia, Nikki and Jack find and assemble the skull fragments and make an unnerving discovery that challenges their theory of what happened to Dan Lambert. However, when an imprisoned Taliban fighter is found dead in the compound, the team suspect he was murdered, and suspicions grow about Sean Nugent and his men's treatment of prisoners. No longer able to trust anyone, the increasingly isolated team doggedly piece together the circumstances surrounding Dan Lambert's disappearance, but the shocking truth triggers a chain of events which leaves everyone's lives in danger.
Premiership footballer Isaac Dreyfus finds his career in tatters after a sex tape links him to the brutal murder of a young woman, threatening to destroy both his reputation and marriage. He is desperate to prove his innocence, while Adam Freedman turns to a mysterious source for help to avenge the murder of his wife and child. Nikki finds it hard to deal with Leo’s death following the arrival of the new Lyell Centre boss, pathologist Thomas Chamberlain.
Nikki and Jack head to Scotland to help earnest rural detective DS Jason Ross investigate the chilling murder of a lap dancer found in a remote forest. In their search to find a suspect, the team clash with rogue city detectives DS Mike MacNeil and DI Simon Laing. But as more human remains are unearthed in the forest, it becomes horrifyingly apparent that a dangerous serial killer is at large. News of the murders unsettles new mother Sarah, who is harbouring a dark secret from her partner Steve.
Jack's world has been blown apart following the discovery of Hannah's dead body. Nikki manages to find out the truth behind Jack and Ryan's strained relationship. Thomas thinks about hiring forensic scientist Helen as Jack's permanent replacement. Christy Nash is scared for the future of his marriage and business after DI Carter finds out abouts of his relationship with 15-year-old Katie.
After Sergeant Sam Honeywell is discovered beaten and shot in his burnt-out car in Essex, the police are furious in what is a hugely emotive and political case for them, and DCI Jim Sullivan is determined to track down Honeywell’s killer. After a local drug dealer and son of crime boss Dean Fallon seems to have his alibi sewn up, suspicion falls much closer to home.
Father and son Bill and Frankie McAteer are killed in a horrific car accident on their way home from work at Billingsgate Market. Nikki and Jack arrive at the scene of the crash to meet DS Jodie Tanner, and to discover Frankie's body still in the car but riddled with bullets. Whoever was driving the SUV had a gun. Back at the Lyell centre, Nikki's post mortem examinations suggest that Frankie was the target, rather than Bill. Clarissa and Max discover a deleted video on a mobile phone showing a sexual encounter between Frankie, his girlfriend Becky and best friend Liam, which was posted on a revenge porn website. However when Liam is also killed, the video becomes the key to the killings. When Nikki and Tanner visit Becky, her flatmate Paul enters and she bursts into tears about the murder. But Paul looks like he has worries of his own… Meanwhile, Clarissa's husband Max is an expert in the fast-developing field of digital forensics and lends some equipment to help crack Frankie's seemingly-empty phone, his arrival causing an icy reaction from both Thomas and Jack.
Examining the contents of Liam's phone, Clarissa has found a longer version of the video and sees a flash of Paul's face as he peers from the stairs. Retrieving Paul's laptop, Clarissa takes it to Max's lab and finds reams of communication between Paul and another person, under pseudonyms, which starts to unravel the mystery of the Billingsgate killings. Meanwhile, Clarissa is amused to see Thomas' nose put out of joint and Jack soon feels paranoid that Max is poaching Clarissa for his own lab. Will Clarissa remain with the Lyell team?
Nikki travels to Mexico to attend the funeral of Luisa, a former intern at the Lyell Centre who was murdered in a carjacking in her native country. She soon stumbles across the post-mortem report and realises that the body is not that of her ex-colleagues. Assisted by Dr Eva Vasquez and fired up with the idea that Luisa might still be alive, Nikki and Jack trace her last-known movements and are led to a farm where a cartel massacre was carried out.
A frantic Jack carries out forensic examinations on the spot where Nikki disappeared. With Thomas at the airport ready to come out and help, but still 24 hours away and no leads left to follow, Jack receives a text message containing a mysterious phone number. However when Jack calls through, expecting to hear from Nikki's captors, he is shocked at who answers the phone. Last in the series
Nikki struggles to come to terms with life back home and seeks out fellow pathologist Sally Vaughan for support, only to learn she is nowhere to be found. National Crime Agency investigator Guy Bernhardt asks Nikki to help him by employing pathologist David Cannon, the chief suspect in Sally's disappearance. As Jack, Clarissa and Thomas share concerns about Nikki's wellbeing, a body found in a reservoir is linked to a murder case from 16 years previously. Return of the crime drama, starring Emilia Fox, with Julian Rhind-Tutt and Alex Macqueen.
Nikki's suspicions about David Cannon are roused further when she discovers blood in the boot of his car an with Thomas's support she takes samples to process. Does it belong to Sally Vaughn? Meanwhile, the uncovering of the body from the 16-year-old murder shines the spotlight on three people who went to the same school. Emilia Fox stars, with Julian Rhind-Tutt and Alex Macqueen.
A woman is murdered and the forensic evidence takes the team to a cosmetic clinic where the victim had been receiving various treatments seemingly for free, but Nikki and Silva are frustrated by the CEO of Hamilton Ashe hospital when he blocks access to Karen's medical records. Meanwhile, when his daughter Rosie turns up at the Lyell as her mum is in hospital over a pregnancy complication, Thomas must play the doting father for a few weeks - a role that does not come naturally.
Nikki comes face-to-face with Simon Laing once again as the motive for the murders appears to be blackmail. The hospital computer database has been hacked and Clarissa and Max follow the forensic clues to a teenage hacker called Splinter. The danger comes much closer to home, however, when Nikki receives a threatening text with a picture of Rosie.
Nikki is still in shock as the team arrive at Matt's residence but insists on working at the Lyell, determined to help. When analysing crime scene photos and the positions of the victims' bodies, Nikki realises there is a pattern. Together, the team uncover a secret that has been held by those at the very top of the US government.
While two care home staff are chasing Kevin McDowd, a young man with learning disabilities and sociopathic tendencies, Nikki and Jack examine a fatal road accident where the deceased is Kevin McDowd's mother. The investigation led by police sergeant Button should be straightforward, but the forensic evidence suggests foul play.
The team are determined to uncover the truth about unexplained deaths of patients at a care home. They are desperate to rescue Serena and return her to safety. Unbeknownst to her colleagues in the Lyell Centre, Clarissa allows herself to be admitted to the care home in order to investigate. Her determination to find out what happened at the care home leads her to uncover a shocking truth, but puts her life in danger.
It is Christmas morning and Nikki is awaiting a call from Matt who is back in the States. Instead, she receives a call to say that the team is needed: a family has been massacred at an enormous property owned by Andy McMorris, the CEO of a haulage company. Greeted by SIO DI Gibbs, Nikki is first on the scene whilst Clarissa is connected to the action via screens and microphones back at the Lyell. Having left his father to celebrate Christmas without him, Jack is just arriving to join them when a gunshot suddenly rings out. With Gibbs lying on the floor with a life-threatening injury, the team realise that the shooter might still be on the grounds. Are they also in danger?
After a teenage boy is killed in a meth lab explosion, his inspirational head teacher Noah Taylor resolves to confront the drug dealers preying on his community. Dangerous batches of new drugs are hitting the streets, and the effects are evident to Nikki, Jack, Clarissa, and Thomas as they deal with the rise in both violent and accidental deaths linked to the narcotics, while tragedy strikes at the heart of the Taylor family.
When a gang of dealers recruit young men to push spice and fentanyl near a London school, head teacher Noah Taylor has no choice but to confront them. DI Kate Ashton leads the police investigation, and as well as tracking down those responsible for the recent deaths, Ashton also seems keen to pursue the possibility of a relationship with Jack. When the pair search a suspect's flat, Jack gets caught up in a rising tide of violence, which culminates in several deaths. Nikki, Thomas, Jack and Clarissa must work to find those responsible before it's too late.
During a heatwave in Brighton, the Lyell team is summoned to a waste dump where a body part has been found. The search is on to recover the other dismembered remains and piece together the victim's body, which is covered in intricate Japanese tattoos. Nikki has some news that she desperately wants to share with Matt, but must wait until he visits from America.
With the remains of a second tattooed victim appearing in a Brighton recycling plant, it seems the Lyell team is on the trail of a serial killer. Working closely with local detectives DI Taramelli and DS Quicke, they must painstakingly piece together the evidence, and unearth the connections between a diverse range of suspects.
A shocking incident on a suburban street brings back painful memories for Jack, forcing him to revisit his past. As a member of the victim's family seeks justice of their own, forensic evidence discovered by the Lyell suggests the involvement of a Northern Irish terrorist group, long-thought inactive.
A private jet crashes into woodland outside London. Its passengers include the former US ambassador, Jonathan Kraft. Nikki calls her partner Matt from the crash scene to break the news - his friend and former colleague did not survive the accident. Matt is desperate for answers. When Thomas is called to an apparent suicide of a successful businessman, he finds unexpected connections to the plane crash. Are they dealing with a coordinated attack?
Nikki and the Lyell team continue to investigate the plane crash, ruling out an explosion and engine failure. Suspicion turns to Rowan Cole, the so-called Deadhead - a non-flying pilot who was hitching a lift back when his intended flight was cancelled. The investigation takes a turn when they discover a connection to a sinister online forum. Nikki’s partner Matt is grieving following the death of his close friend, putting their relationship under strain.
When a body is found in a field near the village of Hartford, Nikki and the Lyell team confirm it is that of missing teenager Jason Forbes. Working to the theory that most killers strike close to home, the ambitious DCI Claire Ashby is committed to proving the guilt of her main suspect, local locksmith Malcolm Wilde.
Investigating the murder of a teenage boy, Nikki and her team are forced to question police methods. Although Thomas discovers evidence that throws the time of death into doubt, DCI Claire Ashby seems more concerned with building the case against her main suspect. With pressure building on the police to secure a conviction, the Lyell team must fight to ensure that inconvenient truths aren't overlooked. Meanwhile, Clarissa notes a troubling parallel with a case from the start of her career. Is the real murderer still out there?
Nikki determines that Jenny must have died before making contact with the tracks. But when the search for Jenny’s killer hits a wall, her friends at the women’s refuge seek answers. Meanwhile, Thomas’s political ambitions lead him to make friends in high places. Offers are made to open all the right doors for Thomas, but what do they want in return?
Amanda Burton, who portrayed lead character Dr Sam Ryan for eight years, shares her thoughts on how and why Silent Witness became the television institution that it remains today.