Penny, while I subscribe
to the Many-Worlds THEORY...
The Big Bang Theory Season 3, Episode 3
An article was just published
in Scientific American about our THEORY.
The Big Bang Theory Season 8, Episode 18
It's just a THEORY.
It's not even worked out.
The Big Bang Theory Season 10, Episode 15
...I will be the scientist
who confirmed string THEORY.
The Big Bang Theory Season 2, Episode 23
NARRATOR:
Previously on The Big Bang Theory:
The Big Bang Theory Season 8, Episode 1