There was no ALIEN.
[chuckles]
The Big Bang Theory Season 12, Episode 18
Yeah. It's like if Alien and Predator
decided to go partners in a Jamba Juice.
The Big Bang Theory Season 4, Episode 4
He was only pretending to be scared to trick the ALIEN king.
The Big Bang Theory Season 12, Episode 18
Do you remember
what happened to the ALIEN...
The Big Bang Theory Season 4, Episode 21
...from Earth in case one of them
is encountered by ALIEN life.
The Big Bang Theory Season 8, Episode 21