
How did you figure out
that it was the GEOLOGY lab?
The Big Bang Theory Season 7, Episode 3

and the Geology Department.
The Big Bang Theory Season 5, Episode 1

Geology. Oh!
The Big Bang Theory Season 7, Episode 20

H-Him and
his GEOLOGY.
The Big Bang Theory Season 12, Episode 24

Well, GEOLOGY
The Big Bang Theory Season 7, Episode 20