
Rule NUMBER two in a marriage:
The Big Bang Theory Season 12, Episode 5

Judging by my e-mail, a NUMBER of prisoners
at the Michigan State Penitentiary found it.
The Big Bang Theory Season 1, Episode 17

and your haircut is NUMBER three
on that poster from 1946.
The Big Bang Theory Season 5, Episode 18

What NUMBER were you putting in?
The Big Bang Theory Season 9, Episode 9

What are you thinking,
maybe a big musical NUMBER?
The Big Bang Theory Season 3, Episode 3