
Sheldon, that computer
is used for NATIONAL defense.
The Big Bang Theory Season 4, Episode 18

...I'm gonna get
a NATIONAL commercial.
The Big Bang Theory Season 3, Episode 12

like dancing hippies
at the Redwood National Forest.
The Big Bang Theory Season 5, Episode 2

Holy crap, are you connected
to the Oak Ridge National Laboratory?
The Big Bang Theory Season 4, Episode 18

Also, we're pretty sure
he knifed a Mexican NATIONAL in '03.
Breaking Bad Season 2, Episode 2