The year is 1920, and an ambitious doctor meets a nun apparently traumatised by what she witnessed in the Great War. An attempt to restore the woman's sanity results in the uncovering of something very sinister indeed.

Theo is determined to seek happiness with her husband's business rival, Vincent. Having fled London for Paris, however, she soon learns of Richard's financial collapse - and discovers that rather more than just his job is at stake.

A triple bill of archive BBC radio dramas, believed lost for over half a century and only recently rediscovered. "Butter in a Lordly Dish", written specially for radio in 1948, features Richard Williams as Sir Luke Enderby KC, whose infidelities lead him into trouble when he goes to meet his latest flame. Williams also stars as Hercule Poirot in "Murder in the Mews", a 1955 adaptation of a short story. A young woman is found dead in her flat the day after Guy Fawkes night.

Polina Nazarova is a soprano whose past is dangerously entangled with the present. Given the opportunity to sing her Tosca opposite the arrogant and cruel Andre Breon, it seems that her desire for revenge may prove irresistible.

War-wounded sailor Dickie Carpenter is haunted by strange visitations from a ghostly woman. When his friend Robert tries to solve the mystery, though, he ultimately has to fight his own terrifying battle between love and death.

A group of adventurers set out from Damascus to visit the legendary Gate of Baghdad, also known as the Gate of Death. When one of the party is found dead, the others look to the seemingly unimpeachable Mr Parker Pyne.

When editor Susan Ryeland is given the manuscript of Alan Conway's latest novel, she has no reason to think it will be much different from any of his others. After working with the best-selling crime writer for years, she's intimately familiar with his detective, Atticus Pünd, who solves mysteries disturbing sleepy English villages. An homage to queens of classic British crime such as Agatha Christie and Dorothy Sayers, Alan's traditional formula has proved hugely successful.

With World War II at an end, Charles Hayward is finally free to marry the woman he loves, Sophia Leonides. However, she refuses - the unexplained death of her grandfather, wealthy businessman Aristide Leonides, draws her back to the suffocating environment of her family home. Charles follows, but his arrival coincides with the discovery that Aristide’s death was murder. The ensuing investigation drags Charles into the dark heart of the family, and its deadly secrets and dangers.

Mrs. Packington felt alone, helpless, and utterly forlorn. But her life changed when she stumbled upon an advertisement in the Times that read: "Are you happy? If not, consult Mr. Parker Pyne." Equally adept at putting together the fragments of a murder mystery or the pieces of a broken marriage, Mr. Parker Pyne is possibly the world's most unconventional private investigator. Armed with just his intuitive knowledge of human nature, he is an Englishman abroad, traveling the globe to solve and undo crime and misdemeanor.

A foggy night... a lonely country house... and a woman with a gun in her hand quietly surveying the dead body of her husband. It looked like a straightforward case of murder. Or was it? As the ghosts of an old wrong begin to emerge from the past, the case begins to look anything but straightforward... First staged at the Duchess Theatre in London in 1958, this play ran for 604 performances and is as gripping and ingenious as you would expect from the Queen of Crime.