![There was no alien.
[chuckles]
There was no alien.
[chuckles]](https://content2.mcqstudy.com/ss/tbbt-12-18-00:20:58.692.jpeg)
There was no ALIEN.
[chuckles]
The Big Bang Theory Season 12, Episode 18

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

I'm even on some
ALIEN conspiracy blog.
The Big Bang Theory Season 12, Episode 20

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

...he's allergic to Earth nuts,
but I'm the ALIEN.
The Big Bang Theory Season 8, Episode 21