It's more likely that you will spend
your careers teaching FIFTH graders...
The Big Bang Theory Season 2, Episode 6
Uh, well, it's not
May the FIFTH...
The Big Bang Theory Season 7, Episode 22
There's only three people in this house,
and you'd still be my FIFTH guess.
The Big Bang Theory Season 10, Episode 10
I think
it's only the FIFTH stage
The Big Bang Theory Season 12, Episode 24
I was done with Latin by FIFTH grade.
The Big Bang Theory Season 3, Episode 2