January 1910. A journalist has been killed in a suspicious blaze. Everything points to a group of suffragettes, but the apparent culprit insists she is innocent. When Lady Hardcastle receives a letter from a suffragette requesting her urgent help, the retired spy turned sleuth knows only she stands between an accused young woman and the gallows. Evidence at the scene makes Lizzie Worrel’s innocence difficult to believe, and with the police treating it as an open-and-shut case of arson, Lady Hardcastle faces a barrage of resistance as she tries to dig out the truth.

September 1909, and Lady Hardcastle and her maid, Florence, have been invited to Lord Riddlethorpe’s country estate for a week of motor racing and parties. They both agree that it sounds like a perfectly charming holiday. But when one of the drivers dies in a crash during the very first race, they discover that what seemed like an uncharacteristic error in judgement may have a more sinister explanation...

July 1910. Lady Hardcastle and her tireless sidekick Flo have finally embarked on a long-overdue seaside break. But just as they’re wavering between ice creams and donkey rides, their fellow guests start to go missing - and the duo find themselves with a hysterical hotel manager and a case to solve. The first to disappear is Dr Goddard, a scientist doing something terribly top-secret for the government. 

August 1911. Emily Hardcastle and her inimitable lady’s maid Florence Armstrong are enjoying a fine summer until Harry, Lady H’s brother, turns up out of the blue with a mystery for them to solve. A routine parachute test at a local aeroplane factory has gone horribly wrong - with pilot Dickie Dupree plummeting to his death. Harry is certain there is more to this ‘tragic accident’ than meets the eye, having discovered that someone at the airfield is leaking top secret intelligence to foreign rivals.

Spring, 1909, and Lady Hardcastle, amateur sleuth and all-round eccentric, is enjoying a well-deserved rest. But a week after a trip to the cattle market, Spencer Caradine, a local farmer, turns up dead in the pub, face-down in his beef and mushroom pie. Once again, it is up to Lady Hardcastle and her maid, Florence, to solve the case. Armed with wit and whimsy, not to mention Florence’s mean right hook, the pair set out to discover what really happened and why. Was it poison or just ill luck?

It's Christmas 1909, and for once Lady Hardcastle - respectable gentlewoman, amateur spy - and her lady's maid, Florence Armstrong, are setting sleuthing aside. They are invited to the festivities up at The Grange, as guests of Sir Hector and Lady Farley-Stroud. But barely have corks been popped and parlour games played when a mysterious crime comes to light.

A scoundrel lies dying, and he makes his confession; his sins were despicable, and he wants to atone for his wasted life. He bequeaths an invaluable gift to Monks Hood Abbey, an ancient monastery set in a lonely corner of the Yorkshire moors. But sin throws a long shadow and corruption crawls in its shade. Strangers come forward and lay claim to the monks' inheritance.

London, 1925. With their band the Dizzy Heights, jazz musicians Ivor ‘Skins’ Maloney and Bartholomew ‘Barty’ Dunn are used to improvising as they play the Charleston for flappers and toffs, but things are about to take a surprising turn. 

It's 1920, and Christmas is coming. Major Lennox finds a body on his doorstep - why on his doorstep? Was it to do with the Countess? Was it about the ruby necklace? Lennox goes to Melrose Court, home to his uncle, Lord Melrose, to uncover the mystery. But then, the murders begin, and it snows, and it all becomes very complicated.

Georgie is excited for her first Christmas as a married woman in her lovely new home. She suggests to her dashing husband, Darcy, that they have a little house party, but when Darcy receives a letter from his aunt Ermintrude, there is an abrupt change in plans. She has moved to a house on the edge of the Sandringham estate, near the royal family, and wants to invite Darcy and his new bride for Christmas. 

Mydworth's Excelsior Radio Company is world-famous for its expensive radio-phonographs. But suddenly the Excelsior delivery lorries start being hijacked, and the very future of the company is in doubt. Is this just about stolen radios - or is there something more secret and dangerous going on? When Harry and Kat are brought in to help, they decide to go undercover to solve the crimes and soon discover there are many more secrets to this mystery than meets the eye.

Lavinia's annual Masked Ball at Mydworth Manor is a highlight of the season, as locals mingle with the great and famous from London. But the lavish party comes to a full stop when one of the guests is found dead down by the lake. It seems it's a clear case of a heart attack. But Harry and Kat suspect that the dead man in a mask was in fact the victim of a clever case of murder. And the killer's work at the party is not yet done... Nathaniel Parker, born in 1962, graduated from the London Academy of Music and Dramatic Art and went on to join the Royal Shakespeare Company.

Who killed Sir Crispin Gibbons? A wedding invitation and news of mischief that could be murder takes Lennox to the Earl of Bloxford's country estate. He, soon, finds himself in a world of purloined artworks, forgeries, and a priceless Bloxford beauty. But who are the Bloxford beauties? And why are they the focal point around which death swirls?

From the authors of the best-selling series Cherringham. A young poacher is found shot dead in the woods of a grand estate near Mydworth. A sad accident it would seem. But the boy's mother is convinced it is murder and when Harry and Kat investigate, they find the poacher's life was not as innocent as he made out... Nathaniel Parker, born in 1962, graduated from the London Academy of Music and Dramatic Art and went on to join the Royal Shakespeare Company. His television career began in 1988 when he played Flying Officer 'Flash' Gordon in the LWT mini-series "Piece of Cake".

Sussex, England, 1929. Mydworth is a sleepy English market town just 50 miles from London. But things are about to liven up there, when young and handsome Sir Harry Mortimer returns home from his diplomatic posting in Cairo, with his beautiful and unconventional American wife, Kat. No sooner have the two arrived, when a jewel robbery occurs at Harry's aunt's home - Mydworth Manor. The police are baffled and overwhelmed with the case. But Harry and Kat have an edge in the hunt for the dangerous culprit.