
Ahem. "I don't care for perchloroethylene
and I don't like glycol ether."
The Big Bang Theory Season 4, Episode 1

Okay, look. Ahem.
The Big Bang Theory Season 1, Episode 3

Okay. Ahem.
The Big Bang Theory Season 6, Episode 6

- Hey, Sheldon? Ahem.
- Yes?
The Big Bang Theory Season 4, Episode 1

Yeah, AHEM, well, my question is,
and I'm pretty sure I know the answer...
The Big Bang Theory Season 4, Episode 1