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

What? In the
Chattahoochee National Forest in Georgia?
The Big Bang Theory Season 10, Episode 1

at the National Accelerator..."
[inhales]
The Big Bang Theory Season 12, Episode 9

by the number of colors
in the oldest NATIONAL flag still in use--
The Big Bang Theory Season 9, Episode 8

A state can allow you to go into
the NATIONAL reserve and steal the gold,
Money Heist Season 3, Episode 5