An appearance
by George Lucas's DERMATOLOGIST.
The Big Bang Theory Season 10, Episode 6
I hear you're a DERMATOLOGIST.
The Big Bang Theory Season 8, Episode 4
My uncle is his DERMATOLOGIST,
and Stan's doing him a favor.
The Big Bang Theory Season 3, Episode 16
Oh, yes, you're
the DERMATOLOGIST.
The Big Bang Theory Season 7, Episode 23
That's what my DERMATOLOGIST said.
The Big Bang Theory Season 10, Episode 22