
- Keen OBSERVATION, goodbye.
- You see where you went wrong, don't you?
The Big Bang Theory Season 1, Episode 12

His OBSERVATION of high-energy positrons
has provided the first evidence...
The Big Bang Theory Season 2, Episode 11

Are you familiar
with Darwin's OBSERVATION...
The Big Bang Theory Season 4, Episode 18

That's not overconfidence.
That's OBSERVATION.
The Big Bang Theory Season 2, Episode 12

We just want to keep her
a little longer for OBSERVATION.
The Big Bang Theory Season 7, Episode 15