Harry, Arthur, and Adelaide look into the murder of a nun at one of the notorious Magdalene Laundries. A witness insists that the killer is the ghost of a young woman who was tormented by the nun and died six months earlier.
A boy shoots a prominent suffragette, insisting that he’s avenging a murder from a past life.
After a heckler is struck down at a faith healer’s show, the team investigates whether the healer is really channeling the power of God. As always, Houdini does not believe in the preacher but suddenly develops ailments after making his opinion known. As for Doyle, the state of his wife makes him even more desperate in proving Houdini wrong.
A businessman is killed by a mysterious phantom with demonic eyes and gravity-defying leaps.
A psychic, Madame Korzha, leads the police to an abducted girl. When another girl goes missing, Merring asks Korzha to help... along with Harry and Arthur.
Harry and Arthur find themselves in opposite positions when they investigate a potential spotting of aliens in an isolated English village: Harry believes that aliens exist, while Arthur suspects the delusions of a madman.
A case involving two people who died of apparent demonic possession takes the team to the infamous Bedlam asylum... where Arthur's father was committed. Now events seem to be repeating themselves.
Bram Stoker, writer of Dracula, shows up at his friend Arthur's house and insists that someone is trying to kill him. His maid soon turns up dead, and Arthur and Harry end up confronting people who believe that they are vampires.
The key to solving a murder caused by a poltergeist may be Thomas Edison's necrophone, allowing contact with the deceased. Meanwhile, Harry deals with the death of his mother, and Adelaide learns the truth about her husband's death.
A minister wakes in a village in Ontario and discovers that the 47 other residents in his village are dead, without the slightest sign of violence.