Just explaining the theory of RELATIVITY.
The Big Bang Theory Season 6, Episode 5
When Einstein came up
with special RELATIVITY...
The Big Bang Theory Season 3, Episode 14
about RELATIVITY,
was always rooted in twins.
Westworld Season 3, Episode 8
Einstein's RELATIVITY equations
pop out.
The Big Bang Theory Season 11, Episode 13
...of the equations of general RELATIVITY
and hydrodynamics...
The Big Bang Theory Season 6, Episode 24