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

Then a laser will map
the reflective SURFACE...
The Big Bang Theory Season 6, Episode 5

what do you say we get back
to SURFACE tension of domain walls?
The Big Bang Theory Season 9, Episode 10

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

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