A list of mythological characters and beings that appeared or were mentioned on the show.
These beings are based on actual mythologies and folkore that were adapted for use on the show. Some examples include:
- Greek mythology (Zeus, the Siren etc.)
- Egyptian mythology (Anubis, Isis, etc.)
- Irish folklore (Leprechauns, Banshee etc.)
- Polish folklore (Nixies)
- Scandinavian mythology (Valkyrie)