But we haven't
finished the PUZZLE.
The Big Bang Theory Season 7, Episode 3
Did Sheldon and Amy give
you guys that PUZZLE, too?
The Big Bang Theory Season 11, Episode 12
Your next PUZZLE is a riddle.
The Big Bang Theory Season 7, Episode 3
Not the cube, but the PUZZLE of
why I couldn't solve the cube.
The Big Bang Theory Season 12, Episode 19
The first PUZZLE is a PUZZLE!
The Big Bang Theory Season 7, Episode 3