If there are an infinite NUMBER
of parallel universes...
The Big Bang Theory Season 4, Episode 5
Based on the NUMBER of chirps
per minute and the temperature...
The Big Bang Theory Season 3, Episode 2
There's a NUMBER.
The Big Bang Theory Season 5, Episode 17
if the bus had
an unknowable NUMBER of parts.
The Big Bang Theory Season 12, Episode 23
Nobody knows, that's why he's NUMBER one.
The Big Bang Theory Season 9, Episode 10