What emergency happened at the LA Zoo?
The Big Bang Theory Season 10, Episode 17
I thought it smelled
like a petting ZOO in here.
The Big Bang Theory Season 10, Episode 8
We go to the ZOO all the time.
The Big Bang Theory Season 5, Episode 12
...the order is petting ZOO first,
then buy vegetables.
The Big Bang Theory Season 8, Episode 24
The last time
we went to the ZOO,
The Big Bang Theory Season 5, Episode 4