He was cooking
and selling CRYSTAL meth, Susan.
The Big Bang Theory Season 10, Episode 1
Oh, i-it's just this
dumb CRYSTAL wand
The Big Bang Theory Season 12, Episode 2
And this is a high-pulse laser
with a BBO CRYSTAL.
The Big Bang Theory Season 12, Episode 22
Crystal.
Breaking Bad Season 3, Episode 11
For a fired schoolteacher
who cooks CRYSTAL meth,
Breaking Bad Season 4, Episode 4