One time my brothers
made me breathe HELIUM.
The Big Bang Theory Season 12, Episode 6
Not quite accurate.
The Macy's balloons are filled with HELIUM...
The Big Bang Theory Season 4, Episode 24
the abbreviation for HELIUM.
The Big Bang Theory Season 7, Episode 3
You see, instead of
using liquid HELIUM...
The Big Bang Theory Season 11, Episode 8
"Helium."
The Big Bang Theory Season 2, Episode 5