...a working PROTOTYPE of the Mars Rover.
The Big Bang Theory Season 8, Episode 3
All right, I think we've got a PROTOTYPE
ready to test. Hand me that Tupperware.
The Big Bang Theory Season 2, Episode 22
we've put a lot of thought and effort
into this current PROTOTYPE.
The Big Bang Theory Season 10, Episode 23
we've put a lot of thought and effort
into this current PROTOTYPE.
The Big Bang Theory Season 10, Episode 15
Penny says they're having fun
working on the PROTOTYPE.
The Big Bang Theory Season 9, Episode 19