Murdoch investigates the bludgeoning murder of a respected art dealer who had an illicit cache of erotic drawings. Meanwhile, Ogden examines a woman clearly abused by her husband and tries to save her from a brutal and politically powerful spouse.
Crabtree and Effie are attending the scandalous wedding of a high-society man to an artist's model when the giddy bride suddenly drops dead. Murdoch soon surmises that she may have been poisoned by her custom-made perfume.
A former coworker at a logging camp asks Murdoch to exonerate him from a decades-old murder. With little evidence beyond testimonies, Murdoch struggles to find anything exculpatory, but a twist in the case reveals there's more to the story.
While teaching at a rural clinic, Ogden is surprised when a badly injured man is brought in, abandoned, and then dies. After Murdoch determines it was blunt-force trauma, the couple go undercover at a Mennonite colony to investigate the killing.
On the eve of her exoneration, Ogden attends a dinner party at the warden's home, where she's surprised to see that her combative former brother-in-law is also a guest. Their frosty exchange turns heated when the warden is stabbed with a steak knife.
The morning after a track-and-field event that announced plans to take a women's team to the 1912 Olympics in Stockholm, a hotshot male sprinter who had jeered and hurled insults is found dead on the field, a javelin through his chest.
Hart and her PI friend happen across the body of a young military recruit being pulled from the lake. Hart notes injuries inconsistent with drowning, but when Brackenreid tells her to leave the matter to the military, she turns to Murdoch for help.
The pending arrival of Halley's Comet forces the constabulary to contend with hysterical citizens convinced it portends the world's end. A doomsayer is stabbed, and the investigation leads to James Pendrick, who plans to save the best and brightest.
Crabtree and Effie arrive for their honeymoon at a hotel in Hampshire, England, only to stumble upon the dead body of another guest. Although the hotel manager claims it was a heart attack, the newlyweds suspect foul play and begin to investigate.
A man is shot in the head at a boarding house, and when the unusual military revolver used is traced back to Brackenreid, the inspector is arrested for murder. Brackenreid maintains his innocence, but the evidence begins to pile up against him.
Ogden is sentenced to three years in prison for the death of Abigail Prescott, the abused wife of a nefarious alderman. Convinced Prescott fatally dosed his wife with laudanum, Murdoch pursues the cocky politician with a vengeance.
A year after the "teener" murders by an insane killer clown, Louise Cherry's bestselling book about the event is being turned into a movie. But when an actress is murdered during filming, Murdoch begins to fear a copycat killer is on the loose.
Murdoch and Brackenreid investigate the shooting of a photographer. Meanwhile, Higgins's secret side hustle using his automobile to courier packages takes a wrong turn after he starts working for some unsavory characters.
After Brackenreid announces his retirement, Murdoch hopes to be promoted to inspector, but the younger, less experienced Detective Edwards gets the job. When a constable is strangled in a flop house, Edwards's heavy-handed tactics hamper the inquiry.
Terrence Meyers utilizes the stationhouse for a clandestine meeting between President Taft and Prime Minister Laurier. As he leaves, a suspicious death is reported at the telegraph office, and soon more people are reporting unexplained symptoms.
Murdoch has resigned from the police in protest over Edwards's questionable methods. When he's approached by the guardian of a missing heiress, he initially turns down the case until he discovers the man is an intrepid inventor and kindred spirit.
After a dire prophecy by his Aunt Oleander, Crabtree leaves Effie at the altar, hoping it will save her life. Murdoch and Higgins investigate the murder of two gravediggers in a pauper's field that appears to have been perpetrated by a corpse.
When a writer is murdered at a literary event, Brackenreid finds a drinking buddy in fellow monarchist Rudyard Kipling and Ogden befriends Edith Wharton, but Crabtree is snubbed by former protégé Lucy Maud Montgomery.
Watts tells Murdoch of a vagrant's death at a rail camp. Now working as a PI, Watts had been hired to infiltrate the community to find the victim, who had come into an inheritance. Then another man is killed, and Murdoch suspects a sequential killer.
At a reception for Toronto's new symphony orchestra, the maestro is found strangled. It turns out the victim had a mistress, a secret that wasn't exactly hidden from his wife. Meanwhile, one of the violinists takes too much of an interest in Ogden.