
could be evidence
of ALIEN civilization.
The Big Bang Theory Season 12, Episode 20

A semi-truck might be an ALIEN robot...
The Big Bang Theory Season 6, Episode 2
![[IN ALIEN LANGUAGE]
[IN ALIEN LANGUAGE]](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
[IN ALIEN LANGUAGE]
The Big Bang Theory Season 8, Episode 21

They exist in case we ever make contact
with an ALIEN civilization.
The Big Bang Theory Season 9, Episode 10

finds proof of ALIEN life.'
The Big Bang Theory Season 12, Episode 20