
♪ The Earth BEGAN to cool ♪
The Big Bang Theory Season 5, Episode 11

♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 24

♪ The Earth BEGAN to cool
The Big Bang Theory Season 5, Episode 19

♪ The Earth BEGAN to cool
The Big Bang Theory Season 12, Episode 7

♪ The Earth BEGAN to cool
The Big Bang Theory Season 7, Episode 11