
"The FIFTH annual East Rutherford,
New Jersey, Gay, Lesbian, Bisexual...
The Big Bang Theory Season 2, Episode 18

but I spent most of FIFTH grade
with my head in a toilet.
The Big Bang Theory Season 7, Episode 2

I was done with Latin by FIFTH grade.
The Big Bang Theory Season 3, Episode 2

You, uh, moving into the apartment
on the FIFTH floor?
The Big Bang Theory Season 6, Episode 8

I think
it's only the FIFTH stage
The Big Bang Theory Season 12, Episode 24