Before Jack the Ripper terrorised London, Police Inspector Samuel Ravenscroft patrolled the streets of Whitechapel. Clever and hard-working, Ravenscroft nonetheless has the worst record in the force. He lets a murderer escape during a chase and is banished to the spa town of Malvern for a water treatment to cure his asthma. Ravenscroft accepts a dinner invitation from a new acquaintance, Jabez Pitzer. Before dinner, the maid finds Pitzer slumped over his desk - dead. Ravenscroft immediately recognises the signs - Pitzer has been poisoned.

Black-eyed Nick played a trick and poor old Fred lost his head. It’s 1876 and a dead body is found near the mansion of Lady Agatha Aston in Grosvenor Square, London. The newly formed Detective Branch at Scotland Yard is baffled by the series of grisly murders that seem to come straight from the pages of a "penny dreadful". Who is the demon stalking the streets of London? Lady Agatha takes matters in hand, ably supported by golf fanatic friend, Betty Stevens, former school hockey captain, "Sausage" Gossage and Talleyrand, her unlucky-in-love Basset hound.

Sherlock Holmes thrives on danger. Sudden knife attacks, being stalked, and facing a network of assassins present little more than a cheery break in the monotony. But the enigmatic Lady Beatrice presents danger of a different kind. Is she a murderer or a potential victim? Or something even more perilous? Uncovering her secrets could change Holmes's life forever, and in ways even he cannot anticipate.

London in 1919 was a city of ghosts and absences, haunted by the men who marched away but never came back from 'the war to end all wars.' Grace Armstrong believes that she has come to terms with her own loss, the death of her fiancé, the brilliant and dazzling best friend of her brother. He was declared Missing in Action during the Battle of the Somme, but he starts to reappear both in her waking life and dreams. Grace is appalled when a body, dragged from the Thames, is identified as Catherine Smith, who has lodged with Grace and her family before suddenly disappearing.

Frances Wynn, the American-born Countess of Harleigh, enjoys more freedom as a widow than she did as a wife. After an obligatory year spent mourning her philandering husband, Reggie, she puts aside her drab black gowns, leaving the countryside and her money-grubbing in-laws behind. With her young daughter in tow, Frances rents a home in Belgravia and prepares to welcome her sister, Lily, arriving from New York - for her first London season. But no sooner has Frances begun her new life than the ghosts of her old one make an unwelcome appearance....

Autumn, 1888. While the city is horrified by Jack the Ripper's murder spree another, less publicized killer is at large. Each murder takes place right after the Ripper killings, as the murderer appears to be taking advantage of the lack of police resources to tackle two major investigations at the same time. Inspector Albert Norris is charged with bringing the railway killer to justice, but clues are few and the killer's motive unclear.

When the body of a young man is found stuffed into the tomb of a medieval knight, Parish Constable Daniel Haze is tasked with investigating his first solo murder case. Suspicion instantly falls on the only stranger to arrive in the village of Birch Hill just before the crime took place, but the American captain proves to be an unexpected asset. A former soldier and a skilled surgeon, Jason Redmond is not only willing to assist Haze with the investigation but will risk his own safety to apprehend the killer.

Eliza Thomson is back in Moreton after nearly 30 years away. Her best friend Connie is eager to introduce her to the villagers, but their excitement vanishes when they bump into the ill-tempered Mrs. Milwood. Days later, when Mrs. Milwood is found dead, the evidence confirms she was murdered...and there are no shortage of suspects. With the finger of suspicion pointing at a childhood friend, Eliza is keen to clear her name. But an inspector from New Scotland Yard has other ideas. He won't have her interfering with the investigation.

A long line had formed for the standing-room-only section of the Woffington Theatre. London’s favorite musical comedy of the past two years was finishing its run at the end of the week. Suddenly, the line began to move, forming a wedge before the open doors as hopeful theatergoers nudged their way forward. But one man, his head sunk down upon his chest, slowly sank to his knees and then, still more slowly, keeled over on his face. Thinking he had fainted, a spectator moved to help, but recoiled in horror from what lay before him.

England. 1923. After a year away at finishing school where she learned etiquette, deportment, and the difference between a fish fork and a salad one, Kitty Worthington is eager to return home. But minutes after she and her brother Ned board the Golden Arrow, the unthinkable happens. A woman with a mysterious connection to her brother is poisoned, and the murderer can only be someone aboard the train. When Scotland Yard hones on Ned as the main suspect, Kitty sets out to investigate.

Dundee, Scotland, 1862. After the mill of businessman Matthew Beaumont burns to the ground, Detective Sergeant George Watters is sent to investigate. Soon, George discovers that this is not the first property that has been targeted. When a man is found dead in the hold of a trade ship, George discovers a shocking connection between Beaumont and foreign powers threatening the very country.

A man’s body washes up on a beach on the North Yorkshire coast with a single gunshot wound to the chest. The only clue to the victim’s identity is a ring engraved with two names. DCI Tom Raven is back in his hometown of Scarborough for the first time in over 30 years. When offered the chance to lead the murder investigation, he takes it. Raven quickly discovers that the prime suspect is his once-teenage friend, now a wealthy but shady businessman. He finds an ally in Detective Sergeant Becca Shawcross, but not everyone in the team is on his side.

London, September 1666. The Great Fire rages through the city, consuming everything in its path. Even the impregnable cathedral of St. Paul's is engulfed in flames and reduced to ruins. Among the crowds watching its destruction is James Marwood, son of a disgraced printer and reluctant government informer. In the aftermath of the fire, a semi-mummified body is discovered in the ashes of St. Paul's, in a tomb that should have been empty. The man's body has been mutilated, and his thumbs have been tied behind his back.

Northumberland, 1809: A beautiful young heiress disappears from her locked bedchamber at Linn Hagh. The local constables are baffled and the townsfolk cry "witchcraft". The heiress' uncle summons help from Detective Lavender and his assistant, Constable Woods, who face one of their most challenging cases.

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.