
I challenge you to find a single REFERENCE
to Kryptonian skin cells.
The Big Bang Theory Season 1, Episode 2

I'm surprised you know that REFERENCE.
The Big Bang Theory Season 8, Episode 19

Is that a REFERENCE
to my speech impediment?
The Big Bang Theory Season 7, Episode 10

...you might wanna skip the REFERENCE
to bowel movements.
The Big Bang Theory Season 1, Episode 1

was an obvious REFERENCE
The Big Bang Theory Season 7, Episode 3