You, uh, moving into the apartment
on the FIFTH floor?
The Big Bang Theory Season 6, Episode 8
you wouldn't have been FIFTH
on my list.
The Big Bang Theory Season 12, Episode 7
I was done with Latin by FIFTH grade.
The Big Bang Theory Season 3, Episode 2
Before that, I was in college,
and before that I was in the FIFTH grade.
The Big Bang Theory Season 1, Episode 4
It's more likely that you will spend
your careers teaching FIFTH graders...
The Big Bang Theory Season 2, Episode 6