Holy crap, are you connected
to the Oak Ridge National Laboratory?
The Big Bang Theory Season 4, Episode 18
Remember the grant proposal I submitted
to the National Science Foundation...
The Big Bang Theory Season 2, Episode 23
...I'm gonna get
a NATIONAL commercial.
The Big Bang Theory Season 3, Episode 12
the National Belt Buckle Collectors
The Big Bang Theory Season 10, Episode 19
The National Child Care Association
gives it high ratings.
Breaking Bad Season 4, Episode 5