Part One: Chandler and Miles investigate the slaughter of four people at a tailor's fortified workshop. Buchan, retained by Chandler as the team's historical adviser, believes that the huge archive at Whitechapel station will provide the necessary insight into the baffling crime, that appears to echo the Ratcliff Highway murders two-hundred years earlier. However, with no obvious point of access, both Chandler and Miles are puzzled as to how the killer would have committed the crimes without being seen.

Part Two: When a second mass murder occurs, the M.O. matches the first case - again there was no obvious break-in and no forensic evidence to identify the killer. Chandler and Miles then discover that in both cases, food and drink was known to have been disappearing from the fridge days before the murders, and work out that the killer must have been hiding in the underbelly of the murder scenes, ready to pick the perfect moment to commit the crime. But can they identify the location of his next spree in time?

Part One: As Chandler and Miles attend the christening of Miles's daughter, a fox runs through the streets of Whitechapel with a human arm in its mouth. Soon, more body parts from the same victim are washed up by the river, all containing evidence of a fatal poisoning. When limbs of a second victim are uncovered, Buchan believes the crimes echo the Thames torso murders of the 1880s - can the team, with the help of a female DI from South of the river, attractively like Chandler in her habits, crack the gruesome case?

Part Two: When traces of the aphrodisiac Spanish fly are found in the bodies of the two murder victims, Chandler and Miles question what kind of killer they could be up against. As further victims come to light, the team are taken to the heart of a dark obsession where they discover that romance and love haven taken a sinister turn, and that the killer is picking his victims based on the appearance of his 'lost love', the driving force behind the murders. But can they catch him before he becomes out of control and strikes again?

Part One: When a babysitter is murdered, the post mortem reveals that her mobile phone had been thrust down her throat. Shortly afterwards, a second victim is discovered, having had his blood used to cover a wall which he was graffiting on. Chandler, Miles and the team suspect a dangerous patient and former Whitechapel resident, who has recently escaped from a psychiatric unit, and is obsessed with Lon Chaney and the film London After Midnight, where the sins of the victims are used against them during their murder.

Part Two: With the body count rising following the murder of a young boy in a police firefight, Miles and Chandler clash over the direction of the investigation. Having already survived the killer's wrath once, Morgan Lamb is of particular interest to the team - especially Chandler. When she is attacked again, miraculously surviving the killer's advances a second time, Miles is certain of her involvement. As the chase escalates, will the team be able to put their differences aside in the face of their toughest adversary yet?

Part One: Chandler and Miles investigate the gruesome murder of an apparent tramp when they discover that the victim was a former spy, forcing the team to cross paths with MI6 as they attempt to discover whether an old adversary of the deceased is responsible. The murder, they discover, is a 16th-century torture, the peine forte et dure, and after a second body is found – an elderly woman burnt at the stake – they realise that someone has started a witch hunt and is now killing suspected witches in Whitechapel.

Part Two: As the witch-hunt continues, the team discover that a third victim has disappeared and could be hours from death. They discover that a common link to known witch hunts is ergot poisoning, where the victim has to appease all of those he believes to be responsible for cursing him. Kent and Mansell come to blows during the investigation. Chandler is dissatisfied at the thought he may once again catch the killer on their deathbed. Miles suspects that something is going on in the bowels of the police station.

Part One: The discovery of a flayed face in a Whitechapel gallery sparks the start of a killing spree where the victims are being found with no faces, fingerprints and the skin having been sliced from their back. The first victim, a Russian gangster, was in the midst of attacking a young girl when he was murdered, but the girl describes the killer as having an elderly female appearance. Could the killer really be an old lady? Or is the killer disguising himself with masks of his previous victims, or possibly even something more sinister?

Part Two: The team discover that the motives behind the killings lie in criminal cases where the accused have escaped justice. When a fourth victim is discovered barely alive, the team are led to a young boy whose mother was killed in a hit-and-run incident by the victim. Convinced that he is the killer, both Chandler and Miles are shocked when they discover that the only crime he is responsible for is that of a tirade of abuse against the victim. Meanwhile, Buchan's research puts him in danger, and in the midst of the killer.

Part One: Chandler has to pull the team together after an abysmal team-building exercise. Meanwhile, a disembowelled body is discovered in a sewer. The team must establish whether a killer is at large, or if feral swine have returned to London's sewers. When a second victim is pulled into the dreary depths on the way home from work, the team realise that the killer is targeting local 'heroes', all of whom have been interviewed for the local paper. However, they find the journalist's choice of dinner holds a clue to the investigation.

Part Two: As further victims emerge, Chandler is forced to take desperate measures when Buchan suggests that the lack of discovery of the victims' missing organs could suggest that cannibals are operating in Whitechapel. When a priest is brutally murdered, a link to a doomsday cult is uncovered, where members of the group believe that eating the organs of innocent souls will save them from an oncoming apocalypse. Will Chandler and the team finally manage to round up the killers before he or she meet their unexpected fate?