
about their THEORY
being disproved.
The Big Bang Theory Season 12, Episode 10

I know this is just
a scientific THEORY,
The Big Bang Theory Season 12, Episode 10

The string THEORY research
being done is a dead end.
The Big Bang Theory Season 1, Episode 12

Previously on
The Big Bang Theory:
The Big Bang Theory Season 7, Episode 13

Sorry, the Swedes
disproved your THEORY.
The Big Bang Theory Season 4, Episode 2