
We can't ask Leslie Winkle.
The Big Bang Theory Season 1, Episode 13

Leslie Winkle.
The Big Bang Theory Season 1, Episode 13

...why does it have to be Leslie Winkle?
The Big Bang Theory Season 2, Episode 2

Yeah, Leslie Winkle.
The answer to the question:
The Big Bang Theory Season 1, Episode 13

...or as I call it, the Leslie Winkle
Experimental Methodology.
The Big Bang Theory Season 2, Episode 2