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

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

The National Science Foundation
The Big Bang Theory Season 7, Episode 6

They're melting the NATIONAL reserve! Why?
Money Heist Season 3, Episode 7

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