
All right, so
this PARTICLE here
The Big Bang Theory Season 5, Episode 21

...of a subatomic PARTICLE
called the Higgs boson.
The Big Bang Theory Season 6, Episode 3

Senior theoretical PARTICLE physicist
at CaITech, focusing on M Theory.
The Big Bang Theory Season 3, Episode 14

You'd be surprised how many
PARTICLE physicists have a whimsical side.
The Big Bang Theory Season 2, Episode 13

But Penny has no interest
in subatomic PARTICLE research.
The Big Bang Theory Season 3, Episode 15