
He taught your son
CHEMISTRY in high school.
Breaking Bad Season 2, Episode 2

I am an extremely overqualified
high school CHEMISTRY teacher.
Breaking Bad Season 2, Episode 3

of The Handbook of
Chemistry and Physics
The Big Bang Theory Season 7, Episode 6

Now, this Gale Boetticher
is a bona fide CHEMISTRY genius.
Breaking Bad Season 4, Episode 7

And in CHEMISTRY, no less.
The Big Bang Theory Season 7, Episode 10