
...and Dr. Winkle just ripped
the sign-up sheet off the wall.
The Big Bang Theory Season 2, Episode 3

...why doesn't he have to support me
in my hatred of Leslie Winkle?
The Big Bang Theory Season 2, Episode 2

Dr. Winkle, what colorful name
did you call Dr. Cooper this time?
The Big Bang Theory Season 2, Episode 3

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

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