
♪ The Earth began to cool ♪
The Big Bang Theory Season 5, Episode 21

...it'll create a black hole and swallow up
the Earth, ending life as we know it.
The Big Bang Theory Season 1, Episode 15

♪ The Earth began to cool
The Big Bang Theory Season 7, Episode 1

♪ The Earth began to cool ♪
The Big Bang Theory Season 5, Episode 23

blew up the Earth anyway.
It's a made-up story,
The Big Bang Theory Season 7, Episode 16