what do you say we get back
to SURFACE tension of domain walls?
The Big Bang Theory Season 9, Episode 10
If there is life beneath
the SURFACE of these planets,
The Big Bang Theory Season 11, Episode 10
...with silicone RTV
to provide a better mounting SURFACE?
The Big Bang Theory Season 2, Episode 18
in the Earth's
SURFACE.
The Big Bang Theory Season 7, Episode 3
...on a SURFACE located
at the farthest reaches of our cosmos.
The Big Bang Theory Season 6, Episode 5