Can you recommend a SURFACE
The Big Bang Theory Season 7, Episode 18
Then a laser will map
the reflective SURFACE...
The Big Bang Theory Season 6, Episode 5
...as the SURFACE of
an n-dimensional superfluid.
The Big Bang Theory Season 8, Episode 23
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