TV series example of the word

The Big Bang Theory Season 5, Episode 12
We both know that's your koala face.

The Big Bang Theory Season 7, Episode 10
of a koala and an otter

The Big Bang Theory Season 12, Episode 4
Was that the imaginary talking koala?

The Big Bang Theory Season 12, Episode 4
Yeah, so did the koala.

The Big Bang Theory Season 8, Episode 2
Yeah, the correct animal for interspecies super soldier is koala.