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

I study the brain, the organ responsible
for Beethoven's "Fifth Symphony."
The Big Bang Theory Season 4, Episode 24

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

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

Oh, not just date night.
Our FIFTH anniversary.
The Big Bang Theory Season 8, Episode 24