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

we've put a lot of thought and effort
into this current PROTOTYPE.
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

we've put a lot of thought and effort
into this current PROTOTYPE.
The Big Bang Theory Season 10, Episode 15

All right, I think we've got a PROTOTYPE
ready to test. Hand me that Tupperware.
The Big Bang Theory Season 2, Episode 22