When a man is found dead at the Bodleian Library, Lewis investigates a link between the death and an intruder on a local professor's property.

With his six-month trip to New Zealand with Hobson on the horizon, Lewis is in a race against time to save his career and relationship.

The corpse of a missing student is discovered in the attic of a college chapel.

Lewis and Hathaway are drawn into a world of virtual bullying, but very real murder, when a professor is found dead after her dating video is leaked online.

As Lewis and Hobson embark on a relationship, a former don is murdered on the night of his release from prison - crushed to death by a Jaguar Mark two.

Hathaway and Maddox continue to investigate the murder of Travis as the trail leads back to Lewis’s original case. The two detectives attempt to prevent another murder and Lewis sees himself isolated and alone with his reputation in jeopardy.

When a local businesswoman is bludgeoned to death, it appears to be a blackmail plot gone wrong. As the body count rises, Lewis and Hathaway realize there is a decades-old secret at the heart of the case, which they must uncover to bring the present-day murders to a halt.

When a botanist accidentally digs up the body of the recently buried Murray Hawes, Lewis and Hathaway are set upon a seemingly impossible quest.

Liam Jay is in intensive care and Lewis and Alex believe that he has information about the death of Matt Whiby and the mysterious cremation. It is revealed by Emma Barnes that Johnny Jay, Liam’s father, was at the fateful supper party and he is missing as well.

Lewis' reputation is jeopardized when the very first case that he solved as a DI is reopened for appeal and new murders are committed with the original weapon.

When an idyllic Oxford summer's day is torn asunder by a gruesome parcel bomb, Lewis and Hathaway are called in to investigate.

Lewis investigates the murder of a beautiful young Eastern European woman whose death comes straight from the pages of a popular fantasy novel.

When Lewis and Hathaway are called in to investigate the murder of a rising Oxford theatre star, they focus their suspicions on his acting colleagues.

After a body is found on an Oxford tour bus, Lewis and Hathaway are led to Crevecoeur Hall, a sprawling Oxford estate where Hathaway spent much of his childhood.

The ethics of a questionable drug on the Oxford campus of anti-depressants calls into account the questionable judgment of a psychiatry professor.

When a classics scholar is stabbed to death and dumped in the Oxford Canal, Lewis, Hathaway and Maddox find themselves sorely tested by a bizarre case.

Lewis and Hathaway are thrown into a delicate case involving one of the Oxford University's most prominent figures.

When an Oxford housewife is found hanged in her home, Lewis and Hathaway unearth a far darker murder case than the initial suicide verdict suggests.

Lewis and Hathaway investigate a link between the murder of a professor of German history and the recent winner of a local underground boxing bout.

When an old friend of Hathaway's commits suicide, Lewis investigates a link between his death and a religious group whose members are being targeted by a killer.

When religious fanatic Steven Mullan is murdered, Lewis investigates celebrity atheist Tom Rattenbury and his family, who had been attacked by Mullan.

On a bank holiday weekend Lewis and Hathaway are called in when a top quiz competitor is found floating dead in the fountain of an Oxford college.

Lewis and Hathaway investigate the murder of a university friend of pathologist Laura Hobson. As more deaths occur, they realise that Laura's past may hold the key.

Oxford's last all-female college is holding a reunion party to say goodbye to one of its most popular professors. After a guest is found murdered, Lewis believes the killing is connected to an attack that happened at the same building 10 years ago. He turns to his former DS, Alison McLennan, to help him with the case, but it ends up taking a new twist after two more bodies turn up.

An embalmed body is discovered dumped by an isolated farm track. Funeral director Brian Miller identifies the body and GP Matt Whitby confirms the gentleman died of cancer.