
It's Leslie Winkle, Penny.
She belittles my research.
The Big Bang Theory Season 2, Episode 2

Leonard and Penny?
Leonard and Penny?
The Big Bang Theory Season 9, Episode 14

Your inability
to successfully woo Penny...
The Big Bang Theory Season 1, Episode 14

in the same way that Leonard and Penny
are in their relationship.
The Big Bang Theory Season 10, Episode 18

Leslie, this is Penny, she lives across
the hall from Sheldon and me.
The Big Bang Theory Season 1, Episode 5