A new team of detectives, the Cold Case Squad, is put together to re-examine evidence of unsolved murders using advanced technology. In their first investigation DCI Peter Boyd has a second go at nailing the murderer of Alice Miller, a young girl who disappeared five years ago. Trouble is, the perpetrator is as keen as Boyd to act again, and abducts another girl...
Hoping that new DNA tests will reveal the killer's identity, DCI Boyd has the original abductee's body exhumed. But he soon comes to discover that the kidnapper is looking for more than money -- he wants revenge on Boyd's team.
A young woman sets fire to an abandoned car in a street and takes photographs of it as it burns. Boyd walks by and tackles her to the ground, attempting to shield her from the possible explosion. He later learns that her father died in a car accident a few years earlier in that spot, and she refuses to accept that his death was an accident. Although not officially a cold case, Boyd is intrigued and reluctantly agrees to investigate.
Boyd has Marina's uncle, Mike Coleman and her mother Gwen brought in for questioning while Frankie does a little searching in their home. The team find the items that were recovered from the car nine years ago and suspect that Perry Coleman was being blackmailed. Boyd has the body exhumed and the DNA results surprise everyone.
Workmen are burrowing in the crypt of a Catholic church when they come across the skeletal remains of a young man buried in concrete. The squad sets about trying to pinpoint the identity of the body, which was buried with the accoutrements of certain Catholic rituals. Even more oddly, there is a message in Braille buried with the corpse, which tums out to be a passage from one of St Paul's letters to the Corinthians
The team suspects that the body was never meant to be discovered.
The hunt continues for the murderer.
The team uncovers some long hidden family secrets while questioning the community & congregation. Also Frankie discovers a possible biological connection between the former parish priest, Father Stuart, and the first victim.
Boyd and the team decide to reopen the 25 year old case of Annie Keel, a woman who was tried and convicted of a double homicide solely based upon her own confession. Boyd doubts the validity of the conviction, and decides to dig deeper to possibly discover what really happened. Why did Annie confess? Did she really commit murder, or was she covering for someone else?
Boyd and the team continue their investigation of the Annie Kee case, and try to locate her son who was present during the murders.
When the corpse of a well-known police woman who went missing a year earlier is found floating in the Thames, Boyd and his team of investigators try to track down who murdered her and her unborn child.
Grace is not convinced that the stalker who confessed to the murder is truly guilty. But who really killed the police officer? Was it possibly the stalker, her ex-husband, or the married father of her unborn baby?
The Cold Case team is forced to enlist the help of a psychotic serial killer named Thomas Rice, AKA "the Gambler" (because he left playing cards at the scenes of his murders). The one woman who escaped death at his hands, the cool and poised Dr Clare Delaney, gets a dreadful reminder of her past ordeal and a fearful shock when a playing card is flung at her car windscreen as she sets off to make a house call on a wet, windy, dark night.
The team look again at the Gambler's crimes, prompted by Boyd's unshakeable belief that Rice had claimed other, hitherto undiscovered victims.Boyd - who has personal links to the case - and Grace decide to use detective constable Amelia Silver to lure a confession from Rice.
Boyd and the team continue to begrudgingly rely on serial killer, Thomas Rice's assistance on the case, while also trying to protect Dr. Delaney from experiencing her terrifying ordeal once more at the hands of the copycat assailant.
It becomes apparent that he might have help on the outside, so it's crucial that Boyd confronts one of Rice's intended victims, Dr Delaney, to find out what went on during her captivity. Why did he spare her life?
Boyd and the team take on the task of infiltrating the dark underworld of London's gangland crime families when Harry Newman makes a deathbed confession to 12 "unauthorised killings".
Dr Grace Foley is intrigued by this strange expression but Boyd and the rest of the team are tempted to dismiss it as the meanderings of a dying man.
Until, that is, Frankie discovers that Newman did not die of natural causes, but has been murdered. They soon realise there's a lot more to Newman than they imagined. Added to all that, there's a link to a famous fifties trial in which a gangster was hanged for killing two policemen.
The postliminary inquiries into Harry Newman's past and the identities of the possible twelve murder victims uncover a connection to the infamous trial and execution of a well known gangster.
Boyd and his team struggle to find the truth behind the murder of a prominent Home Office adviser, when a petty criminal is acquitted of the crime. Once a prominent feminist activist, victim Katherine Reed had attacked the establishment at every opportunity, only to later switch sides. Boyd's progress on the case is hampered not only by a Home Office audit, which means the team will be shadowed throughout, but also by the fact that the original investigation was conducted by one of his old flames.
Whle facing a surprise audit from the Home Office, DCI Boyd (Trevor Eve) and the team try to continue their investigation into the murder ... but as they go on with their inquiries at Whitehall, they quickly discover the atmosphere to be very dark and secretive.
Twelve years after Joanna Gold famously disappeared in broad daylight on Hampstead Heath, the dress she was wearing is found in a lock-up. The team begin the hunt for her killer.
While under pressure to discover the truth behind the murder of young Joanna, DCI Boyd (Trevor Eve) slips up and makes possibly some irreversible mistakes.
Joanna's killer begins stalking her sister.
A man accused of opening fire on a crowd from a multistorey car park, and killed a policeman, is claiming his innocence. Boyd's colleagues question his loyalties when he seems unwilling to re-investigate. As DC Mel Silver digs deeper, she discovers some disturbing truths about her boss.
Boyd struggles with his past while continuing the investigation on a mass murderer who was also guilty of killing his close friend. Are the Gunman's claims of innocence true? As the team investigate it looks as if someone else may have been involved.
When a convicted killer is cleared at appeal for the murder of his adoptive father ten years previously, Boyd is not convinced that the man is innocent. But the only way to find out is to track down the rest of the family - and with a big inheritance at stake, both parties appear to have a lot to hide.
Following the murder of Mark Lovell's cousin, the team establish that Mark has a watertight alibi, and the search for the real murderer narrows down to the remaining family members.
Their investigation into the two remaining family members is further complicated by the discovery of drug dealing and involvement in the witness protection scheme.
A recovered memory therapist alerts the CCS to a care home regime of sexual abuse of young boys and a suspected murder. Her client who revealed all this in a therapy session goes missing and the team strongly suspect he has gone on the hunt for the man who abused him and murdered his friend.
ln their attempts to prevent another murder, the team desperately tries to establish the identity of the care home paedophile who is also being hunted down by two of his victims..
A mummified body sends the Cold Case Squad back to the sixties and to a Notting Hill house which had been featured in a film as the location for a murderous fight between gangsters.
Renovation works at the house in the present day reveal more bodies behind the walls.
The film starts to appear not so fictional after all. Things get even more complicated when Spencer tells Boyd that he and his family lived there when the events took place.
The gangster responsible for the bodies behind the walls in the Notting Hill house is still active and the unearthing of past events provokes more murders and an international turf war.
Spencer's family history is the key to unravelling the mystery.
Boyd and the cold case team investigate the unsolved murder of a World War 2 conscientious objector. In 1948 George Western was found in his living room with a nine-inch nail through his head. When his grandson Adam finds new evidence and organises a media campaign, the case is reopened. Then the body of elderly William Davis is found in similar circumstances. And Grace uncovers the identical killing of Norman Taylor in 1961. The team discovers that Taylor and Western were in the same regiment during the war and trace surviving members to try to solve the murders.
After the Cold Case Squad discover that all of the victims were apart of the same regiment during the war, they try to put the pieces together to discover why the killer is so determined to extract revenge on his old cohorts.
Boyd and his team face a race against time after a skeleton found in a condemned garage triggers a tragic chain of events. The skeleton is that of garage owner, Gerald Doyle, an Irish terrorist who went missing in 1981. An unexploded car bomb found at the scene points to terrorist activity as the cause of death. However, Doyle’s parents produce a set of his diaries, which reveal that he was actually a mole for the British intelligence services.
The Squad begin to feel like they are being watched, and their fears are realised when they find unauthorised surveillance equipment. It is revealed their victim may have not have been as guilty as they once thought and when a person Boyd questioned as a part of the investigation commits suicide, they realise a missing link between her and a assassination.
Boyd gets 36 hours to get to the bottom of things before the security services take over.
In 1990 - Jason and Cindy, two 5 year-old twins disappear from their home, and even after a nationwide search is launched, they are still not found. Thirteen years later, Jason is found in a hospital suffering from injuries he sustained in a car accident. But where's Cindy? Boyd and the team set out to find her.
The team try track Jason as they work out how the twins were taken and why. They link the twins disapperance to a Dr Roper, who knocked Jason down. They unravel his past and find out some dark secrets.
The squad work out who Cindy is now and try find her before its too late.
A man staying in a "halfway house" for released prisoners uses a gun - that is revealed to have been used in contract killings years ago - commit suicide. The gun is later stolen from Frankie's lab. Investigations reveal that the gun could have been used by a hired assassin in 9 murders over the last 30 years. Boyd is taking Anger Management.
When the gun stolen from Frankie is used in another murder, the Squad suspect the victim's gopher. It is revealed the first murder could have been a case of mistaken identity. Frankie and Grace begin to get creeped out by the effects of Boyd's Anger Management.
The Squad investigate the murders of two males who had the word "Sorry" carved into their backs. The latest victim has a brother linked to Organised Crime, so three other officers are brought in, which Boyd takes an instant dislike to - except Greta.
The new faces create tension in the office and the team cannot trust them.
As the case goes on, they begin to realise that it could be leading to a paedophile group.
The case continues as we learn of the death of D.S. Dave Marvin. Marvin has been found dead in his car with the same markings of sorry on his back. Throughout this episode we learn that Greta is hiding something from us and who is the mysterious old man who keeps turning up every time a body is found???
A young woman with a history of psychiatric problems kills her family by setting the family home on fire. She admits to the crime, but claims that she was coerced in to doing it by a mysterious character known only by the name 'The Shepherd'.
Her psychiartrist links her case to similar cases and gets the Cold Case Squad involved.
Boyd and the team continue to investigate the arson case and the other two other possible crime connections to 'The Shepherd'.
Will the team discover this person's true identity or will it all turn out to be a part of the imagination of a mentally ill woman?
A mummified body is discovered in a disused airliner that has been parked in the desert for 6 years.
There are indications of a link to an armed robbery at Heathrow Airport six years earlier, and a murder at around the same time. Our team gains two new members. DS Andrea Stephenson takes over for DS Mel Silver, and the new mad scientist is Dr Felix Gibson.
Spencer goes undercover as a prison inmate to investigate the possible reasons for the murders from the man convicted of committing the crimes. To Spence's dismay, the man (who is too scared to say anything about what happened) commits suicide before he can be coerced into revealing who the real killer is.
Under the impression that he may receive a confession, Boyd accepts the invite for a visit to the prison from former police officer Eddie Vine, who is serving a life sentence for murdering his friend and former fellow officer, Tom Pallisser.
Boyd is suspended from work after being involved in a hit and run accident while possibly under the influence.
The team continue trying to prove if Vine is innocent or not while also trying to find out who framed Boyd.
A millionaire businessman's body is discovered a year after he dissapeared. It appears that during the time he was missing he was being held prisoner for an indefinite period of time - but why?
The team discover the brutally murdered body of a man in the same cellar that the businessman was held hostage in. While investigating the two victims, the team find an unlikely suspect. They're positive of his connection to the murders, but need to collect the evidence to prove it.
Grace is haunted by an old case that she assisted on at the beginning of her career when she is asked to give evidence at the assailant's appeal hearing.
Someone possibly copying the past crimes begins harassing Grace about her testimony against Tony Greene. If she doesn't admit that she was wrong about him, the assailant promises to murder the victim he/she is holding hostage.
A criminal is about to be released, the team is sure he is a serial killer. They enter in a race against the clock to prove their suspicions to prevent him from getting back out on the streets.
Hunt is released and Boyd has him tailed. Under the noses of his police tail, Hunt drowns a girl at the local baths. There is no proof that he has done this so Boyd releases his name to a journalist hoping that media coverage will give the team something to work with.
The journalist arranges to meet Hunt and is murdered, this time there is evidence to pin the crime on him but before they can arrest him, Hunt's father, finally convinced of his son's guilt, drowns him in the bath.
As DNA evidence from an old case of Spencer's (while he was working for the Atomic Energy Constabulary) is re-examined it appears that the wrong man was sent to jail.
Someone tries to coverup the new evidence, causing all eyes to turn to Spencer.
Spencer goes to apprehend the man who left his DNA at the campaigners' murder scene but is shot at and loses contact with Boyd.
Boyd realises that his investigation is being thwarted by a very powerful insider who has managed to render his team powerless.
The race against time is on as Boyd seeks to get out of the sealed base to save Spencer. As Spencer's life hangs in the balance, will he survive?
With a Sudanese politician in the UK on hunger strike, Boyd and the team look for the missing skull of a 19th century Sudanese ruler.
With a Sudanese politician in the UK on hunger strike, Boyd and the team look for the missing skull of a 19th century Sudanese ruler.
The team are called in when workmen dislodge two sexually conjoined bodies in a former City bank. A 13-digit number on a gold ingot, found with one of the corpses, matches that found on a Cold Case river corpse from 1993.
With the identities of the deceased discovered, the trail takes the team to Dublin where the case takes a further dramatic turn...
The team are called in when workmen dislodge two sexually conjoined bodies in a former City bank. A 13-digit number on a gold ingot, found with one of the corpses, matches that found on a Cold Case river corpse from 1993.
With the identities of the deceased discovered, the trail takes the team to Dublin where the case takes a further dramatic turn...
Detective Boyd and the team investigate events that occurred at a hippy commune in 1967. With double murderer Daniel Lennon still on the loose, Dr Ritter grows concerned that he may kill again.
Detective Boyd and the team investigate events that occurred at a hippy commune in 1967. With double murderer Daniel Lennon still on the loose, Dr Ritter grows concerned that he may kill again.
After the empty and abandoned car of banker Donald Rees is discovered threee years after he went missing, Boyd decides to take on the case in an effort help the man's family find some closure with their lives.
Boyd starts to think he has come to know the missing man and he believes that that Donald Rees is not a murderer. He ends up getting the team to investigate harder at all the different possibilities.
After a woman is discovered stabbed in the eyes and incinerated in her car she is identified as Claire Somers, a neglected child who was taken into care, then later kidnapped in 1986 at the age of seven. Robert Fenchurch had his eyes stabbed out on the night Claire was kidnapped as her abductor fled the scene. The team soon find out that Claire had snatched 15-year-old Abigail Harding, who was found locked in a hotel room. Abigail tells the team what she can remember. The team end up finding a doctor who had been treating Claire, and are surprised to find out it is Teresa Harding, the elder sister of the kidnapped Abigail. The team then finally manage to get a lead on the case.
The team work out that Teresa was running from someone or something in her room and would rather have taken her own life than face up to it. Peter Broading's psych report ends up giving an important clue. Boyd manages to break Broading and he ends up admitting that he was part of Fenchurch's regime. He then reveals that David Drew, a boy of just nine years old was in charge of the violence that went on. Trish ends up giving Sarah a new lead in the case and the team face a race against the clock to solve the case before more blood is shed.
The team are asked to go to a chamber of a little-known subterranean river. The body of a Falklands' veteran-turned-peace activist called Piers Kennedy who has been missing since 1983 has been found directly under the building of the Ministry of Defence.
Grace ends up admitting to the team the truth about her relationship with Murray. She insists though that Murray was actually relieved that the PR stunt by CANW didn't make the news. After looking at the video footage agan, the team see Piers touching the warhead on purpose as he wanted to be identified and caught. They talk to Bonnie, but she insists that she was not the female activist and has no idea what Piers was planning to do. Boyd wants Grace to get information out of Murray despite both Sarah and Spence warning of the dangers.
Karl Barclay a medical student who vanished six years ago comes to the attention of the team when his DNA matches that of a body also discovered six years ago in Hales reservoir. Eve finds signs of torture on the body and Boyd starts to become suspicious that there has been a cover up in the past. Boyd soon discovers that there had been tension in his family that exploded after Karl's evangelical Christian mother, Lisbetta, found out about his conversion to Islam. After becoming unhinged Lisbetta attacks a member of the public, thinking that he killed her son. Lisbetta end up admitting to Gideon that she had to stop her son.
The team think of Karl as a would-be bomber who after backing out from a planned attack was killed by other extremists. Forensics end up indicating that Karl fell to his death from an airplane which points the finger at a state murder and a cover up.
Boyd learns that he is to be moved out of the Cold Case Unit. He chooses for his last case to re-investigate the first case he worked on which was the disappearance of 16 homeless teenage boys between 1979 and 1982.
Boyd goes back to the torture chamber and discovers that Nicholson is already there and admitting that he did indeed let the killer go all those years ago. Nicholson believes that Jason Heath is the responsible but Grace is not as convinced. Sarah ends up going missing as the investigation continues and after her car is found her friends grow more concerned. Boyd is instructed by Nicholson to remain focused on the M11 murders and he will investigate Sarah's disappearance. The team's suspicions about Nicholson increase.