
...and glued a big-eyed rubber ALIEN mask
to the outside of my window.
The Big Bang Theory Season 6, Episode 2

A semi-truck might be an ALIEN robot...
The Big Bang Theory Season 6, Episode 2

Yeah. It's like if Alien and Predator
decided to go partners in a Jamba Juice.
The Big Bang Theory Season 4, Episode 4

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

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