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

...on a SURFACE located
at the farthest reaches of our cosmos.
The Big Bang Theory Season 6, Episode 5

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

that's just a doodle of
a hyperelliptic Riemann SURFACE.
The Big Bang Theory Season 7, Episode 20

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