1860, Wimborne, Dorset. Rebecca Tullidge, miserably married to her callous husband, is having an affair with a railway officer, John Bedloe. Much to her distress, she trips over her lover's dead body on the railway tracks. Determined to win votes for the upcoming election of mayor, Mr Feltham calls for Inspector Colbeck and Sergeant Lemming to solve the hideous crime, which takes longer than anticipated.

December 1860. Headed for the morning shift at the Swindon Locomotive Works is an army of men pouring out of terraced houses built by the GWR, a miniature town and planned community that aims to provide for its employees from cradle to grave. Unfortunately, boilersmith Frank Rodman is headed for the grave sooner than he'd expected, or he will be once his missing head is found. Colbeck, the Railway Detective, finds his investigation into Rodman's murder mired in contradictions. 

East Anglia, 1861. Alone in a first-class carriage, the Swarbricks are robbed at gunpoint. But when the universally admired Swarbrick fights back, the train robber takes more than money and jewellery, killing the man working to unify East Anglia's tangle of railway networks. Inspector Colbeck is brought in from London, but as Swarbrick's glowing reputation begins to crumble, the line of investigation isn't clear. 

When Robert Pomeroy, a young undergraduate at Corpus Christi College, finds a letter slipped under his door in the early hours of a rainy day, he flies into a panic. He hurries to the railway station. But he doesn’t reach his destination alive. Inspector Colbeck and Sergeant Leeming are called upon to investigate this tragedy on the railway. It soon becomes apparent that Cambridge’s hopes of success in the forthcoming boat race rested on Pomeroy’s shoulders. 

London, 1851. With the opening of the Great Exhibition at hand, interest in mounting in the engineering triumphs of the railways, but not everyone feels like celebrating. In an audacious attack, the London to Birmingham mail train is robbed and derailed, causing many casualties. Planned with military precision, this crime proves a challenge to Detective Inspector Robert Colbeck who fights to untangle a web of murder, blackmail and destruction.

Eighteen fifty-nine, St. Mary’s Church, Sponden. A little girl playing hide-and-seek jumps into a freshly dug grave to find a dead man already occupying it. It is the body of Cecile Norton, a senior director of the Midland Railway. Inspector Colbeck and Sergeant Leeming travel to Derbyshire to investigate.

1862. A goods train is speeding through the Sapperton Tunnel when it hits a makeshift pen of sheep inexplicably set up near the exit. The animals are slaughtered by the impact whilst the train hits a pile of rocks and is derailed, seriously injuring the occupants. Inspector Colbeck discovers that the shepherd and his dog are missing. Stephen Rydall who owned the sheep is shocked by the occurrence, which further affects him as he is a major shareholder in the Great Western Railway. 

The year is 1855, and on the LNWR train to London, a criminal is being escorted to his appointment with the hangman. But the wily Jeremy Oxley, conman, thief and murderer, has one last ace up his sleeve: a beautiful and ruthless accomplice willing to do anything to save her lover, including committing cold-blooded murder... When Inspector Robert Colbeck learns that Oxley, his nemesis, has once again escaped, black memories of their shared past leave him no choice but to do his duty.

Derby Day at Epsom Downs and a multitude of people crowd to watch the races: dukes and dustmen, bishops and beggars, privileged ladies and prostitutes. The gamut of Victorian society, though, is also a hotbed for crime and crooks of all kinds. With the country a-flutter in the run-up to this national occasion, events reach fever pitch when a disembodied head is discovered on a passenger train at Crewe; the first in a murky course of events that takes in murder, fraud and race-fixing.

An exquisite silver coffee-pot in the shape of a locomotive is on its way to Cardiff in the care of silversmith, Hugh Kellow. When the coffee-pot is stolen and a murder is committed, Inspector Colbeck and Sergeant Leeming are called in to investigate.

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.

1817. Upon receiving a letter from an old family friend, Clemency van Emden returns from Holland to find her father dead. She refuses to believe the middle-aged man died of natural causes, and the suspicious circumstances of his life during the past few months compel her to ask Peter and Paul Skillen for help. Why would a successful engineer suddenly begin begging for alms on the streets? Had he refused to ask for help, or was he prevented from doing so? 

London, 1818. MP Sir Roger Mellanby attends a performance of Macbeth at Covent Garden, featuring Hannah Granville. It is the final performance of what has been a triumphant production and both the Prince Regent and Hannah's love, Bow Street Rival Paul Skillen, are in the audience. After the show, both Mellanby and the Prince Regent make their way to the stage door for a glimpse of Hannah. 

Yorkshire 1855. When Colonel Aubrey Tarleton walks into the path of a speeding train, he is crushed to death on the track. The famous Railway Detective, Inspector Robert Colbeck, is immediately put on the case to determine why such a well-respected man would have resorted to suicide. Tarleton's wife had recently gone missing, but was the colonel responsible for her disappearance? It's up to Colbeck and his trusty sergeant Victor Leeming to uncover the truth.

The Railway Detective faces his most dangerous adversary yet. It is 1852, and Inspector Robert Colbeck and his assistant Sergeant Victor Leeming are faced with their most complex and difficult case to date. As a train speeds over the Sankey Viaduct, a man is hurled from a carriage and plummets into the canal below. It later transpires that he has been stabbed to death. With no papers by which to identify the man, the detectives' investigation is hampered from the start. Suspecting that the victim may have come from continental Europe, Colbeck and Leeming take the case to France where a new railway is being built by a British contractor.