Centuries ago, Gorgon stabbed the previous Dark One with the Dark One's Dagger, therefore absorbing the dark power and becoming the Dark One. However, Gorgon was eventually killed by someone else, who became the following Dark One.
Gorgon appears to the latest Dark One, Emma Swan, as a hallucination along with all the other previous Dark Ones such as Rumplestiltskin and Nimue. When Hook manages to obtain the blood of Rumplestiltskin, he uses it to open a portal to the Underworld, allowing Gorgon and all the other Dark Ones to return. However, Gorgon the Invincible and the others are banished and absorbed into Excalibur.
- None known (family)
- His name, Gorgon, is also the name of Medusa's species.
- S5, E01: "The Dark Swan" (hallucination)
- S5, E07: "Nimue" (hallucination)
- S5, E10: "Broken Heart"
- S5, E11: "Swan Song"