Big Bad is a term usually used for the television series Buffy the Vampire Slayer but began to be used by some critics and fans to Supernatural.
The genre is divided into the main villains and the secondary villains, the main villain are not always a person or a creature, some times it's only a natural happening or something that is going to happen.
Season villains
Season 1
Season 2
- Main Villain: Azazel
- Supporting Villain: Jake Talley
Season 3
- Main Villain: Lilith
- Supporting Villain(s): Gordon Walker / Bela Talbot
Season 4
Season 5
- Main Villain: Lucifer
- Supporting Villain(s): Zachariah / Horsemen of the Apocalypse
Season 6
Season 7
- Main Villain: Dick Roman
- Supporting Villain(s): Edgar / Lucifer's hallucination