
ARTHUR:
Is the BLOND girl really your girlfriend?
The Big Bang Theory Season 6, Episode 22

You ripped out your own fake BLOND hair.
The Big Bang Theory Season 6, Episode 24

MRS. WOLOWITZ: Howard,
there's a BLOND girl, Patsy, here to see you.
The Big Bang Theory Season 2, Episode 12

I'm just a BLOND monkey to you,
aren't I?
The Big Bang Theory Season 6, Episode 3

Because it's the story of a BLOND girl tirelessly
pursued by a small, oddly shaped man?
The Big Bang Theory Season 8, Episode 7