Hayden: "You know all about the Wild Hunt. How do we get Stiles and the others back?" Theo: "You can't. The Wild Hunt comes, the Wild Hunt goes. That's how it works." Liam: "But they're still here... And they're still taking people." Theo: "That's not possible. They're the Wild Hunt-- they're not just gonna stick around. Unless..." Liam: "Unless what?" Theo: "Unless they're stuck."
A Banshee named Lenore is introduced in this episode through flashbacks and present-day scenes. She is a middle-aged woman who was the only survivor of the Wild Hunt's invasion of Canaan in 1987.
Lydia Martin's Banshee powers continue to grow stronger, as she had an astral premonition in which touching a mirror in the girls' locker room transported her into a vision of April 8, 1987, when the town of Canaan was attacked by the Wild Hunt and all but one of the citizens were erased from existence and captured. Lydia's powers have been steadily growing throughout the series, but she has become increasingly more powerful in Season 5 and Season 6.
The corpses of Malia's adoptive mother, Evelyn, and her younger sister are seen in this episode in a hallucination. They were last seen in flashbacks in Season 3B's More Bad Than Good.
It is also revealed that Malia's sister's name was Kylie.
Lydia revealed that she got the impression that all of the captives of the Wild Hunt eventually became Ghost Riders themselves, a process that seems to hollow out their souls. This, too, was also mentioned by Peter Hale in Radio Silence.
Theo references several past events from Season 5 in this episode:
When he reunited with Malia, he says, "You aren't still upset about the whole shooting-thing, are you?" in reference to when he betrayed her and shot her in the stomach with Braeden's shotgun in Season 5's The Sword and the Spirit.
The title of the episode is a reference to Canaan, which was described as a "ghost town" as a result of the Ghost Riders erasing all but one of the town's citizens from existence and capturing them to become part of the Wild Hunt.
According to Chris Argent, there are nine herbs that counteract the nine supernatural venoms in the world, one of which was in the coating of the Ghost Riders' whips, which lashed him several times in Relics; however, if the herbs aren't mixed in the correct way, they will make the venoms more potent and kill the victim. One of the herbs is mugwort, and the antidote requires honey as a binding agent.
Lydia Martin referenced the Morrígan when talking about Lenore with Malia Tate, stating that the Morrígan is a Banshee and that she is associated with the Wild Hunt. In Irish mythology, the Morrígan (which is Gaelic for "phantom queen" or "great queen") is either described as a single goddess or a triple goddess, specifically a trio sister goddesses most often known as Morrígan, Badb, and Macha. The Morrígan is a battle goddess who is associated with Banshees due to their similar gifts-- as a harbinger of death, she shapeshifts into a crow or raven and flies across the battlefield, and she not only has premonitions of the deaths of warriors, but can also influence the outcome of the war as well. The Morrígan is also associated with crows, fate, the earth, cattle, and sovereignty, and has been compared to the Valkyries and Norns of Norse mythology.
Malia hallucinates that her mother and sister's bodies are laying dead on the ground in front of one of the abandoned houses. After she breaks down in sobs, Theo appears and states that he knows she wishes she had died with them before shooting her with a gun. She falls backward onto the ground between her mother and sister, whose eyes open as they turn on their sides and wrap their arms around Malia. The ground then crumples below them as if creating a grave for the three of them before Malia snaps out of it.
Scott hallucinates that his mother has had a large bite torn out of her head, much like the victims of Garrett Douglas, whose skulls he bit through before stealing their pineal glands.
According to Noshiko Yukimura, the Wild Hunt has been riding the sky and stealing souls since before she was born, which means that they have existed for more than 900 years.