
...of multi-loop N=8 supergravity
using modern twistor THEORY.
The Big Bang Theory Season 2, Episode 5

You know, I didn't seek out
string THEORY.
The Big Bang Theory Season 7, Episode 20

I guess we wait until they're old enough
and let them choose their own THEORY.
The Big Bang Theory Season 2, Episode 2

...I will be the scientist
who confirmed string THEORY.
The Big Bang Theory Season 2, Episode 23