There's a NUMBER.
The Big Bang Theory Season 5, Episode 17
And rule NUMBER one is pants.
The Big Bang Theory Season 8, Episode 23
-remember my telephone NUMBER.
-That’s why I said that.
Money Heist Season 1, Episode 1
I see no reason to suspect universe
NUMBER 44 will be any different.
The Big Bang Theory Season 6, Episode 8
...due to the limited NUMBER of outcomes.
The Big Bang Theory Season 2, Episode 8