Revised ground rule NUMBER one,
The Big Bang Theory Season 10, Episode 19
Jesse's not answering either
phone NUMBER I have for him,
Breaking Bad Season 2, Episode 2
and your haircut is NUMBER three
on that poster from 1946.
The Big Bang Theory Season 5, Episode 18
Helium has
an atomic NUMBER of two.
The Big Bang Theory Season 7, Episode 3
Anything has a NUMBER
if you assign it a NUMBER,
The Big Bang Theory Season 12, Episode 19