
Here, we have a highly gifted researcher
in the field of PARTICLE physics...
The Big Bang Theory Season 3, Episode 15

inventing a new
dark matter PARTICLE
The Big Bang Theory Season 11, Episode 13

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

each vibration is
a different PARTICLE.
The Big Bang Theory Season 11, Episode 13

of the Higgs boson PARTICLE,
and you said,
The Big Bang Theory Season 5, Episode 21