Leslie Winkle is the FIFTH girl
I've ever had sex with.
The Big Bang Theory Season 2, Episode 16
I think
it's only the FIFTH stage
The Big Bang Theory Season 12, Episode 24
Oh, not just date night.
Our FIFTH anniversary.
The Big Bang Theory Season 8, Episode 24
You, uh, moving into the apartment
on the FIFTH floor?
The Big Bang Theory Season 6, Episode 8
It's more likely that you will spend
your careers teaching FIFTH graders...
The Big Bang Theory Season 2, Episode 6