
...and woke up with second degree
CHEMICAL burns on my face.
The Big Bang Theory Season 6, Episode 1

Has a strong toxic
CHEMICAL smell.
The Big Bang Theory Season 5, Episode 2

I was trying to suggest
CHEMICAL castration, but...
The Big Bang Theory Season 7, Episode 23

is the power to transmute
CHEMICAL elements.
The Big Bang Theory Season 7, Episode 3

WALT:
We used a different CHEMICAL
process, but it is every bit as pure.
Breaking Bad Season 2, Episode 1