Penny started taking a class.
She wrote a PAPER.
The Big Bang Theory Season 6, Episode 6
Eyes on your PAPER.
Breaking Bad Season 2, Episode 11
lizard eats PAPER, PAPER
The Big Bang Theory Season 5, Episode 17
my PAPER
to Professor Hawking?
The Big Bang Theory Season 5, Episode 21
I thought your
PAPER was inspired.
The Big Bang Theory Season 7, Episode 7