Following the dramatic finale of Season three, Oxford's finest are picking up the pieces of their personal and professional lives. DC Endeavour Morse awaits the result of his Sergeant's Exam, while DI Fred Thursday and his wife Win struggle to cope with their children flying the nest. Sam gone to the Army and the traumatized Joan, gone off to who knows where? There are even greater challenges still to face.

The continuing stories of rookie Constable Morse.

Lewis and Hathaway face three new mysteries inspired by the Inspector Morse novels of Colin Dexter.

Detective Constable Endeavour Morse becomes drawn into a murder investigation that changes the course of his life.

It's 1969, and things have taken a darker turn for the old Cowley team. With the gang now scattered across Oxfordshire, it takes a series of brutal crimes to reunite them. Now joined by former adversary DCI Ronnie Box and his sidekick DS Alan Jago, the gang must battle crime and corruption to finally solve their greatest challenge, which is to find the truth behind George Fancy's death.

A woman is murdered in Oxford. Her body is discovered by two men who meet for the first time at that moment: Arthur Seldom, a prestigious professor of logic, and Martin, a young graduate student who has just arrived at the University hoping to study with Seldom. It quickly becomes clear that this is the first in a series of murders, all of which are announced by the murderer with strange mathematical symbols. Professor and student join forces to try...

Endeavour and his colleagues are entering a new decade and era of change. Opening on New Year's Eve 1969, normal order has been resumed and the team reunited at Castle Gate CID, with Chief Superintendent Bright back in charge. However, the events of the past year have left their mark. Old friendships will be challenged, and new relationships will blossom.