
Hey, in your super-cooled
HELIUM experiments,
The Big Bang Theory Season 9, Episode 16

Forget HELIUM. The real superfluid
is the fruit punch in this mug.
The Big Bang Theory Season 9, Episode 16

You and Sheldon already came up
with your superfluid HELIUM model.
The Big Bang Theory Season 9, Episode 16

- Helium.
- Yes.
The Big Bang Theory Season 9, Episode 23

the abbreviation for HELIUM.
The Big Bang Theory Season 7, Episode 3