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
Last night, Raj accidentally made
contact with an alien CIVILIZATION...
The Big Bang Theory Season 4, Episode 9
...that any space-faring CIVILIZATION
would have to possess is touch.
The Big Bang Theory Season 8, Episode 21
End of human CIVILIZATION.
Westworld Season 3, Episode 8