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

Actually, funny story, the boys in the LAB
The Big Bang Theory Season 9, Episode 12

Dr. Gablehauser said
if I wanted to set up something in the LAB...
The Big Bang Theory Season 2, Episode 11

Hey, if you'd like, I could show you
the LAB we're working in.
The Big Bang Theory Season 2, Episode 11

Eighteen years ago,
I sent the FBI Crime Lab samples...
The Big Bang Theory Season 4, Episode 7