
He invented the Rubik's Cube.
The Big Bang Theory Season 9, Episode 24

Not the CUBE, but the puzzle of
why I couldn't solve the CUBE.
The Big Bang Theory Season 12, Episode 19

Not the CUBE, but the puzzle of
why I couldn't solve the CUBE.
The Big Bang Theory Season 12, Episode 19

Hint: it's a CUBE of a CUBE
of a prime.
The Big Bang Theory Season 12, Episode 23

Hint: it's a CUBE of a CUBE
of a prime.
The Big Bang Theory Season 12, Episode 23