Agatha, public relations specialist, moves from London to the small village of Carsley, hoping for a quieter, simpler life. She soon finds her dreams dashed when she becomes a murder suspect after entering a quiche-making competition.

In 1837, a diminutive, neglected teenager is crowned Queen Victoria, navigates the scandal, corruption, and political intrigues of the Court, and soon rises to become the most powerful woman in the world.

Following the 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. With sam gone to the Army and the traumatized Joan gone off to who knows where, there are even greater challenges still to face.

Summer 1939. Harry, a translator at the British Embassy in Warsaw, is falling in love with Polish waitress Kasia. When German tanks roll into Poland, and Britain declares war on Germany, Harry and Kasia face terrible choices. With her life in grave danger, can Harry help her, and if he can, how will he ever explain himself to Lois Bennett, the girl he left behind in Manchester?

Set against the stark beauty of the English moor, the mysterious gypsy boy Heathcliff, who has been adopted by the Earnshaw family, discovers his soul mate in his stepsister Cathy. As a man unable to have the love of his life, he seeks vengeance against anyone who comes between them.

As 1968 dawns, a year of change promises to disrupt the private and professional lives of Endeavour Morse and his colleagues. Endeavour's recent promotion leads him to reluctantly mentor new recruit Fancy, while Thursday is beginning to think about life after the police. But in Oxford, crime never sleeps, and the team continues to be challenged by mysterious and intriguing cases of murder, greed, and deception. Meanwhile, the rise of organized crime...

1971 has barely just begun and CID is still reeling from the events of the past year. Any hope of remaining on light duties has vanished and the team find themselves right back in the thick of it.

Based on the beloved character created by M.C. Beaton. Agatha, public relations specialist, moves from London to the small village of Carsley, hoping for a quieter, simpler life. She soon finds her dreams dashed when she becomes a murder suspect after entering a quiche-making competition.

The early life of Queen Victoria, from her ascension to the throne at the tender age of 18 to her courtship and marriage to Prince Albert.

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.