Relax, it's
a hard 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
where the last PUZZLE gives the winner
Sheldon's contact information.
The Big Bang Theory Season 9, Episode 8
The first PUZZLE is a PUZZLE!
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