
Sheldon, you can't train my girlfriend
like a LAB rat.
The Big Bang Theory Season 3, Episode 3

and now I'm sitting
in an engineering LAB at Caltech
The Big Bang Theory Season 9, Episode 19

I don't know.
You guys work in the same LAB.
The Big Bang Theory Season 1, Episode 3

Hey, uh, I just found out I have to be
at the telescope LAB all weekend.
The Big Bang Theory Season 6, Episode 22

to the geology LAB
or the chemistry LAB.
The Big Bang Theory Season 7, Episode 3