Penny says they're having fun
working on the PROTOTYPE.
The Big Bang Theory Season 9, Episode 19
All right, I think we've got a PROTOTYPE
ready to test. Hand me that Tupperware.
The Big Bang Theory Season 2, Episode 22
and took our PROTOTYPE and all of our
research and didn't even tell us?
The Big Bang Theory Season 10, Episode 23
I need to rub my genitals
on their PROTOTYPE.
The Big Bang Theory Season 9, Episode 19
we've put a lot of thought and effort
into this current PROTOTYPE.
The Big Bang Theory Season 10, Episode 15