Last night, Raj accidentally made
contact with an alien CIVILIZATION...
The Big Bang Theory Season 4, Episode 9
They exist in case we ever make contact
with an alien CIVILIZATION.
The Big Bang Theory Season 9, Episode 10
could be evidence
of alien CIVILIZATION.
The Big Bang Theory Season 12, Episode 20
we're gonna have to
rebuild CIVILIZATION.
The Big Bang Theory Season 12, Episode 14
End of human CIVILIZATION.
Westworld Season 3, Episode 8