You know, there's a foundational idea
in string THEORY that...
The Big Bang Theory Season 6, Episode 5
...about the university forcing me
to continue with string THEORY?
The Big Bang Theory Season 8, Episode 2
you used to disprove his THEORY?
The Big Bang Theory Season 7, Episode 10
BERNADETTE:
Previously on The Big Bang Theory...
The Big Bang Theory Season 10, Episode 11