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

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

Okay, here's a question.
As an ALIEN pretending to be human...
The Big Bang Theory Season 8, Episode 8

He was only pretending to be scared to trick the ALIEN king.
The Big Bang Theory Season 12, Episode 18

No ALIEN lady ever told Captain Kirk,
"Hey, get your thing out of my nose."
The Big Bang Theory Season 1, Episode 13