
takes a bullet to the face
from a person or persons UNKNOWN.
Breaking Bad Season 4, Episode 7

"The image of the Professor was so UNKNOWN
Money Heist Season 1, Episode 8

It's just the UNKNOWN thieves
we need to worry about now.
Game of Thrones Season 2, Episode 8

...between the UNKNOWN...
Westworld Season 2, Episode 6

somewhere UNKNOWN.
And most likely...
Money Heist Season 3, Episode 2