You know, these experiments
are pretty HARMLESS.
The Big Bang Theory Season 12, Episode 17
It was a HARMLESS
Halloween prank. Look.
The Big Bang Theory Season 5, Episode 7
Are you saying that I am forbidden
from applying a HARMLESS...
The Big Bang Theory Season 3, Episode 3
I'm just a HARMLESS giant
from a foreign land.
The Big Bang Theory Season 9, Episode 10
It's probably HARMLESS.
The Big Bang Theory Season 6, Episode 8