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

claiming that I said
I found ALIEN life.
The Big Bang Theory Season 12, Episode 20

Last night, Raj accidentally made
contact with an ALIEN civilization...
The Big Bang Theory Season 4, Episode 9

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

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