Quick correction- we call Orthus the father of Cerberus in the episode, but it's actually Typhon! Just swap 'father' for 'brother' and everything still works.
The final and most dangerous task is here, and we've got to go down into the underworld... We've got the whole package: Heracles solving fighting-based problems; Harry Potter connections from Cassie, and Vince going down a rabbit hole about mythological chronologies!
Sources for this episode:
- Frazer, J. G. (1921), Apollodorus: The Library (Volume I). London: William Heinemann.
- Graves, R. (1981), Greek Myths: Illustrated Edition. London: Cassell Ltd.
- Guerber, H. A. (1929), The Myths of Greece & Rome: Their Stories Signification and Origin. London: George G. Harrap & Company Ltd.
- Oldfather, C. H. (1989), Diodorus of Sicily in Twelve Volumes. Volume I: Books I and II, 1-34. Cambridge, Massachusetts and London, UK: Harvard University Press.