
BERNADETTE: Previously on
The Big Bang Theory...
The Big Bang Theory Season 10, Episode 24
![[SINGING]
There was a scientist who had a theory
[SINGING]
There was a scientist who had a theory](https://content2.mcqstudy.com/ss/tbbt-8-21-00:00:18.481.jpeg)
[SINGING]
There was a scientist who had a THEORY
The Big Bang Theory Season 8, Episode 21

Previously on
The Big Bang Theory...
The Big Bang Theory Season 12, Episode 15

I never forgot about
string THEORY.
The Big Bang Theory Season 11, Episode 13