- “I suddenly find myself needing to know the plural of apocalypse.”
- ―Riley Finn[src]
An Apocalypse is defined as specific occurrence which has an exceptionally destructive effect on the human race. The final outcomes of doomsday events may range from a major disruption of human civilization, to the extinction of human life, to the destruction of the planet Earth, to the annihilation of the entire universe. The Buffyverse has featured several events that almost caused an apocalypse, which have, thus far, always been averted thanks to the efforts of the Scooby Gang and the Angel Investigations team.
- Opening of Hellmouth | "Prophecy Girl"
- Possible use of nuclear missiles by Moloch | "I Robot, You Jane"
- All of humanity being burned to death | "Innocence"
- World being sucked into Hell by Acathla | "Becoming, Part Two"
- Opening of Hellmouth | "The Zeppo"
- Destruction of all human life by The Scourge | "Hero"
- Opening of Hellmouth | "Doomed"
- Freezing of time by Gene Rainey | "Happy Anniversary"
- Opening of Dimensional Portals by Glory | "The Gift"
- Draining of the Earth's life energy by Willow | "Grave"
- The death of all living creatures due to the lose of the Sun | "Long Day's Journey"
- Release of the Turok-Hans by The First | "Chosen"
- Wolfram & Hart's scheduled Apocalypse | "Not Fade Away"