
Also, Sheldon may be a ROBOT.
The Big Bang Theory Season 1, Episode 3

Oh, my God. That's Kripke's ROBOT?
The Big Bang Theory Season 2, Episode 12

Word around the plasma lab
is you built a ROBOT?
The Big Bang Theory Season 2, Episode 12

Just a toy ROBOT?
The Big Bang Theory Season 2, Episode 12

He was trying to build some sort of
armed ROBOT to keep me out of his room.
The Big Bang Theory Season 1, Episode 15