As a bit of an ELEPHANT seal buff...
The Big Bang Theory Season 8, Episode 23
And the answer was ELEPHANT.
The Big Bang Theory Season 4, Episode 24
It was kind of the ELEPHANT
in the room, so...
The Big Bang Theory Season 6, Episode 19
What was he, a bad ELEPHANT
who died and went to hell?
The Big Bang Theory Season 5, Episode 10
ELEPHANT?
The Big Bang Theory Season 7, Episode 2