When a demure, engaged librarian, who led a double life as a prostitute in a local saloon, is found strangled, Anna Fulford, still on the run from the Black Hand, helps Murdoch in his murder investigation.

When another prostitute from the Devil's den is strangled, Murdoch discovers they both sang in the same choir, and there is no shortage of suspects.

After a veteran of a brutal North African battle is slain by a sword, Detective Murdoch's prime suspect is the victim's fellow soldier, who is none other than Winston Churchill.

When an anonymous madman threatens the citizens of Toronto with a deadly toxic gas, Murdoch must race against the clock to stop him.

A series of violent drowning deaths of university-educated unmarried career women leads Murdoch to suspect sexist and racist motives.

Detective Murdoch and his methods are compromised when one of his colleagues is implicated in a suspicious murder.

With his colleague sentenced to hang for murder, Detective Murdoch races to exonerate them and steps into a trap set by the real killer.

On a newly christened passenger lake ship to investigate a threat to it, Murdoch must investigate an apparent death of a woman overboard, only to discover a far more complex mystery on board.

Detective Murdoch investigates the death of Peter Farrelly who had a loud altercation with someone the night before his body was found. Dr. Grace determines he was beaten to death. She also found chloral hydrate in his system - a bottle of which they found in the victim's luggage. They believe both the victim and his killer are from Newfoundland and so Murdoch and Crabtree head off to St. John's in the hopes of finding the suspected killer Ezekiel Farrelly. Crabtree was actually raised in St. John's by several aunts who, it turns out, have an interesting occupation. The solution to murder lies with finding an old pirate treasure map.

Detective Murdoch, Inspector Brackenreid, Dr. Ogden and several others are transporting serial killer James Gillies to the prison in Kingston, Ontario where he is scheduled to be executed the next day. It creates a bit of a stir among the passengers when they learn who is being transported. Among them are Aaron Rauls, a late arrival on the train and Nathaniel Henry. Both come under suspicion when the police find a dead man, Dennis Bolton who was released from the Don jail just a week ago. There's no direct connection between Bolton and Gillies but both were in the same jail at the same time. As tensions rise, it becomes evident that Gillies has arranged for several ex-convicts to be on the train - all part of his plan to escape.

Detective Murdoch investigates a series of robberies where the thieves have dug through the the ground and into various shops or banks. The thieves only steal diamonds however. Murdoch suspects the thief is using some type of boring device and that he and Julia may have actually felt it burrowing under the ground the night of the first robbery. Constable Crabtree develops his own theories after interviewing Elva Gordon, a deep cave explorer who believes the Earth is hollow and that there might be an entire world of people living underground. Crabtree now believes "mole people" may be at work. That theory doesn't impress Murdoch who decides to use modern technology to track the boring machine.

Julia, Emily and four of their friends head off to a remote cabin on an island. It's a party to celebrate Lavinda's upcoming wedding to Cedric Maxwell. Cedric's sister is part of the party and she and her brother own the family retreat. Julia is obviously not happy and confides in Emily. Before long however, the women are being killed, one by one. Still reeling from Julia's rejection of his marriage proposal, Murdoch immerses himself in his work. When a drunken Crabtree challenges Leslie Garland to a curling match, he has to put a foursome together. Murdoch declines an invitation to join but applies his scientific approach to helping them play better.

With Murdoch away, Constable Crabtree finds himself investigating the apparent death by poisoning of a visiting Chinese official who was in Toronto seeking men who had participated in the Boxer Rebellion. Their immediate suspect is Wu Chang but as Crabtree gets to know the young man, he is increasingly convinced of his innocence. It turns out it's not Boxers they're after. Murdoch and Julia Ogden meanwhile are trying to find their nemesis, James Gillies. Things take a strange twist when the Cobourg police inform them they may have found Gillies' remains. Ballistics settles the issue but one question remains: who wrote the threatening letters. Murdoch settles that mystery as well.

Detective Murdoch and his colleagues face an entirely new dilemma when they find a local industrialist, Richard Welch, tied down at the top of a telephone pole with a noise-activated bomb strapped to his chest. Mayor Clarkson orders all industries in the area shut down and the police do their best to keep the noise pollution to a minimum. Under pressure, the mayor eventually relents and work resumes, but not until after the bomb is detonated by a loud car horn. The next victim turns out to be the mayor himself and Murdoch has only 3 hours to find the culprit and deactivate the device. Meanwhile, Julia is increasingly frustrated as Murdoch has yet to ask her the big question.

Detective Murdoch investigates the death of Oliver Hoyle who is found in the billiard room of his posh club. Hoyle was part of a group of competitive puzzle solvers and he may have been killed after solving a puzzle published by Edgar Allen Poe many years ago. It appears that one of his competitors killed him to get the glory for himself. Meanwhile, Julia visits her father Lionel but arrives only to learn that her father has died. His physician, Dr. Bradley, believes he died of heart failure sometime in the night. Julia is confused, particularly when Dr. Bradley refuses to undertake an autopsy. Murdoch soon joins her and initially doubts that anything illegal has happened. He reconsiders when he learns that Julia has found a needle mark in her father's neck and a new neighbor is the beneficiary in his will.

Det. Murdoch investigates the murder of Richard Dawkins who was beaten to death at the dinner table by two masked men just as he was about to make an important announcement to his business associates. Since nothing was stolen Murdoch's new boss, Inspector Hamish Slorach, calls the killing an assassination. Dawkins was rumored to be selling his chandlery business. The harbor master says Dawkins was anything but a saint and the police should look to the seedier side for a solution to his death. Const. Jackson is badly beaten by two thugs which seems to confirm Murdoch's suspicion that the men who beat Inspector Brackenreid are the same ones who killed Dawkins. When they find a dead woman on the shore, Dr. Grace determines she was clubbed to death the night before the attack on Dawkins and was manacled before she died. Meanwhile, suffragettes recruit Julia to their movement and she is joined by Emily Grace. Receiving little support politically, they decide to hold a protest march. They are all soon in jail.

The police continue their search for Mick and Tim O'Shea but Inspector Brackenreid is also out on his own looking for them. Murdoch finds someone who confirms that the O'Sheas killed Richard Dawkins but the man also suggests that the O'Sheas aren't working alone. Mrs. Cecily McKinnon, the harbor master, says she knows nothing of extortion on the docks but when pressed, points the finger at one of the merchants, Lionel Jeffries. When the O'Sheas are found dead, shot through the head, Brackenreid becomes the number one suspect. Meanwhile, the ladies who participated in the suffragette protest - including Drs. Ogden and Grace - are still in jail. In court, they find that Leslie Garland is one of the Crown attorneys prosecuting them. They get a bit of a boost when Clara Brett Martin, the first woman lawyer so recognized in the British Empire, offers to represent them.

Legendary U.S. lawman Bat Masterson is in Toronto and claims to have seen the equally legendary Butch Cassidy and the Sundance Kid. Masterson is now a newspaperman and he's already filed a story about the sighting with his New York paper. Murdoch is doubtful about the whole thing and is under the impression that Butch and Sundance had fled to Argentina the previous year. Brackenreid is keen however - and just a bit starstruck - and they set off to find the two men Masterson says he saw. After the Bank of Toronto is robbed - and that quickly followed by a train robbery - Masterson's claims appear confirmed. Masterson himself thinks otherwise and comes clean. Meanwhile, Julia and William's wedding day is fast approaching but they have yet to select just where they will be married. Julia has an idea however. The men of Station 4 plan Murdoch's bachelor party.

During their honeymoon in New York, Murdoch and Ogden uncover a deadly conspiracy threatening U.S. President Teddy Roosevelt, while Brackenreid and Dr. Grace investigate a murder by motorcar back in Toronto.

Detective Murdoch investigates the death of a man found dead on a park bench. Dr. Grace initially determines that he was stabbed in the abdomen but subsequently concludes he was actually suffocated. He also has dried blood on his index finger and three pages from a Mark Twain novel on him. When he returns to the station Murdoch meets Owen Hume who reports that his employer, lawyer Randolph Sampson, has been missing for two days and subsequently identifies him as the man in the park. Meanwhile, Constable Crabtree investigates the disappearance of a corpse, that of Prof. Andrew Richardson, from the medical school. His brain was the object of a medical study by Dr.Dempsy who is researching the brains of highly intelligent people. When it turns out that Sampson and Richardson are the same person Murdoch learns that he's dealing with a group of admirers who wanted to see him in action so to speak. Julia continues her suffrage activities and lawyer Clara Brett Martin confirms that it's possible for a woman to run for elected office.

During a hunt for a killer who collects macabre trophies, Murdoch becomes a target. Meanwhile, Crabtree discovers the recently returned formerly presumed dead husband of his love is an abusive brute.

While investigating the murder of a rich benefactor and the theft of children's presents at a Christmas charity pageant, Murdoch discovers suggestions that a Christmas monster, a Krampus, may be involved.

As the local temperance movement's crusade for local prohibition gains momentum, an opposing politician is found dead after an incident at a drinking establishment.

A baffling bank heist risks Murdoch's reputation.

After Julia is shot at her home, William and his comrades' desperate efforts to respond are complicated when he then mysteriously disappears.

Murdoch and Brackenreid investigate a series of brazen robberies targeting Toronto's businessmen just days before Christmas

Murdoch's investigation of the murder of two debutantes is complicated by the destruction resulting from the Great Fire of Toronto.

Murdoch suspects a connection between dead men found with lipstick smudges on their faces and constable Crabtree's burlesque dancer sweetheart.

Murdoch strives to apprehend a lecherous costumed criminal known as....The Lurker! Then The Lurker's amorous encounters have escalated to murder!

While investigating the death of a championship show dog, Detective Murdoch discovers a hidden affection for canine companions.

A man claims to be a child who was kidnapped 20 years ago.

When William and Julia run a training exercise on their new property, they find it has been used as a burial ground.

A death by explosion leads Murdoch and Detective Watts to a community of secretive women.

A conspiracy to silence a burlesque dancer puts Murdoch and the Station House No. 4 team in unforeseen danger.

Up from Ashes- Murdoch is in trouble. He is accused of murder, and he must prove his innocence. Julia is kidnapped, there is a new chief from the UK, friends gather, and there is a surprise.

After the release of Murdoch and Ogden's book, a series of copycat murders begin to take place.

A man claims to be a child who was kidnapped 20 years ago.

While investigating the death of a championship show dog, Detective Murdoch discovers a hidden affection for canine companions.

Detective Murdoch and his colleagues face an entirely new dilemma when they find a local industrialist, Richard Welch, tied down at the top of a telephone pole with a noise-activated bomb strapped to his chest. Mayor Clarkson orders all industries in the area shut down and the police do their best to keep the noise pollution to a minimum. Under pressure, the mayor eventually relents and work resumes, but not until after the bomb is detonated by a loud car horn. The next victim turns out to be the mayor himself and Murdoch has only 3 hours to find the culprit and deactivate the device. Meanwhile, Julia is increasingly frustrated as Murdoch has yet to ask her the big question.