
- What are you doing in there?
- I'm making hydrogen SULFIDE...
The Big Bang Theory Season 4, Episode 4

SHELDON: Thiospinel SULFIDE.
Thiospinel SULFIDE.
The Big Bang Theory Season 7, Episode 20

Didn't you say you're making
hydrogen SULFIDE gas?
The Big Bang Theory Season 4, Episode 4

SHELDON: Thiospinel SULFIDE.
Thiospinel SULFIDE.
The Big Bang Theory Season 7, Episode 20