
but we did kinda have fun
working on the PROTOTYPE.
The Big Bang Theory Season 9, Episode 19

and took our PROTOTYPE and all of our
research and didn't even tell us?
The Big Bang Theory Season 10, Episode 23

that allowed us to get the size
of the PROTOTYPE down to the target specs.
The Big Bang Theory Season 10, Episode 15

helping to build a PROTOTYPE
for a high-tech guidance system.
The Big Bang Theory Season 9, Episode 19

...a working PROTOTYPE of the Mars Rover.
The Big Bang Theory Season 8, Episode 3