Only a handful of people
in all of HUMAN history...
The Big Bang Theory Season 2, Episode 23
Human beings form emotional
attachments as they grow up.
The Big Bang Theory Season 5, Episode 23
The hallmark
of the great HUMAN experiment...
The Big Bang Theory Season 1, Episode 2
Hey, how'd it go with Human Resources?
The Big Bang Theory Season 8, Episode 2
You reported me to Human Resources?
The Big Bang Theory Season 8, Episode 2