
...as the SURFACE of
an n-dimensional superfluid.
The Big Bang Theory Season 8, Episode 23

in the Earth's
SURFACE.
The Big Bang Theory Season 7, Episode 3

If there is life beneath
the SURFACE of these planets,
The Big Bang Theory Season 11, Episode 10

or under the icy SURFACE
of Europa?
The Big Bang Theory Season 11, Episode 10

Can you recommend a SURFACE
The Big Bang Theory Season 7, Episode 18