Furies are based on the species of the same name from Greek mythology.
After everyone is returned to Storybrooke by Emma for unknown reasons, Robin is surprised by a Fury, who knocks him out and kidnaps him. As the Fury flies off with him, Regina manages to teleport herself in front of the creature and makes it drop Robin. However, Regina is no match for the Fury, who injures her and flies off with Robin. She attempts to follow, but Mary Margaret convinces her to stay behind and let them handle it. Later, Belle provides intel about the Fury, stating it's a demon from the Underworld sent to extract an unpaid price of magic, and that they have until the full moon reaches its zenith before Robin is taken. Believing Emma summoned the Fury, Regina demands that she send it away, but Emma reveals that Regina is the one who didn't pay the price of magic while they were in Camelot (Regina had asked Emma to use her magic to save a dying Robin's life, but Emma apparently never asked for a price in return). The Fury takes Robin to the duck pond, where it opens up a portal, and a ferryman, Charon, appears in a boat, ready to bring Robin to the Underworld. But the Fury it is distracted by Regina, who forces the Fury to take her life instead. The Fury begins extracting Regina's life force, but Mary Margaret, refusing to abandon Regina, links hands with her. Soon, David, Leroy and Arthur do the same, with their combined life forces overpowering the Fury and causing it to explode, paying off the price of magic. Charon disappears into the mist. ("The Price")
- World-crossing - Ability to travel between worlds at will.
- The book that Belle uses to identify the Fury appears to be an alphabetical guidebook on mythological creatures. The following monsters and creatures (barely readable) are listed: ("The Price")
- Futakuchi-onna, a monster from Japanese mythology, in the form of type a woman with two mouths – a normal one located on her face, and a second one on the back of the head, beneath the hair
- Gallu, demons of the Underworld in Sumerian and Akkadian mythology
- Galtzagorriak, a type of iratxoak, or imp, in Basque mythology
- Gana, the attendants of Shiva in Hinduism
|Once Upon a Time: Season Five|
|"The Dark Swan":||"The Price":||"Siege Perilous":||"The Broken Kingdom":||"Dreamcatcher":||"The Bear and the Bow":||"Nimue":||"Birth":||"The Bear King":||"Broken Heart":||"Swan Song":|
|"Souls of the Departed":||"Labor of Love":||"Devil's Due":||"The Brothers Jones":||"Our Decay":||"Her Handsome Hero":||"Ruby Slippers":||"Sisters":||"Firebird":||"Last Rites":||"Only You":||"An Untold Story":|
|Once Upon a Time: Specials|
|"Magic is Coming":||"The Price of Magic":||"Journey to Neverland":||"Wicked is Coming":||"Storybrooke Has Frozen Over":|
|"Secrets of Storybrooke":||"Dark Swan Rises":||"Evil Reigns Once More":||"The Final Battle Begins":|
Note: "Archive" denotes archive footage.