The Enemy Within

May 1915. With thousands of Britons fighting in the trenches, a severely depleted police force remains behind to keep the Home Front safe. Scotland Yard is already overstretched when the sinking of the Lusitania sparks an unprecedented wave of anti-German riots and arson attacks. Among the victims is the immigrant tailor Jacob Stein, found dead in his burnt-out shop.

On the shocking discovery of a passenger's body on the Great Western Railway excursion train, Detective Inspector Robert Colbeck and his assistant, Sergeant Victor Leeming, are dispatched to the scene. Faced with what initially appears to be a motiveless murder, Colbeck is intrigued by the murder weapon - a noose. When it emerges that the victim had worked as a public executioner, Colbeck realises that this must be intrinsically linked to the killer's choice of weapon.

It's 1815. Peter and Paul Skillen, identical twins and fearless thief catchers, stalk all who dare to walk in the shadow of the hangman. When they catch a notorious burglar, they claim a handsome reward and infuriate the Bow Street Runners, who believe they have a monopoly on policing in the capital. Home Secretary Viscount Sidmouth faces a crisis.

December 1669. During one of the coldest winters in living memory, the Thames freezes over, and a frost fair is held on the thick ice. Architect Christopher Redmayne and puritanical constable Jonathan Bale are both visiting the fair when one of Bale's sons gets into trouble on the ice. They rescue the boy but in the process make a grim discovery - a frozen corpse....

When an actor is brutally murdered in a tavern brawl, Nicholas Bracewell, manager of Lord Westfield’s Men, has two problems: First, he has to find an immediate replacement. Second, he must keep his promise to the dying man and bring his murderer to justice. As accidents, robberies, and other misfortunes dog the company, Bracewell starts to suspect a wider conspiracy. When they receive the ultimate accolade - an appearance at the court of Queen Elizabeth - Bracewell’s forebodings grow.