
Here's where we derived the mass
of the dark-matter PARTICLE.
The Big Bang Theory Season 3, Episode 4

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

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

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

to isolate the Higgs
boson PARTICLE.
The Big Bang Theory Season 5, Episode 4