
No one's made a Valyrian steel sword
since the Doom of Valyria.
Game of Thrones Season 4, Episode 1

Aren't you afraid of the Doom?
Game of Thrones Season 5, Episode 5

The fires of Mount Doom?
The Big Bang Theory Season 3, Episode 17

Prophecies of DOOM
are never in short supply,
Game of Thrones Season 7, Episode 5

- Your archenemy?
- Yes, the Dr. Doom to my Mr. Fantastic.
The Big Bang Theory Season 2, Episode 2