
What could
an ELEPHANT
The Big Bang Theory Season 5, Episode 10

It was kind of the ELEPHANT
in the room, so...
The Big Bang Theory Season 6, Episode 19

Yeah, he electrocuted
an ELEPHANT named Topsy
The Big Bang Theory Season 11, Episode 8

You're like those ELEPHANT seal pups...
The Big Bang Theory Season 8, Episode 23

And the answer was ELEPHANT.
The Big Bang Theory Season 4, Episode 24