The last time
we went to the ZOO,
The Big Bang Theory Season 5, Episode 4
Yes. He's new at the ZOO.
The Big Bang Theory Season 2, Episode 13
That's what you said about the
butterfly pavilion at the ZOO.
The Big Bang Theory Season 12, Episode 6
I thought it smelled
like a petting ZOO in here.
The Big Bang Theory Season 10, Episode 8
Hey, I was thinking maybe we take Halley
to the ZOO this weekend.
The Big Bang Theory Season 10, Episode 20