TV series example of the word

The Big Bang Theory Season 5, Episode 2
♪ The Earth began to cool ♪

The Big Bang Theory Season 7, Episode 10
♪ The autotrophs began to drool, Neanderthals developed tools ♪

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

The Big Bang Theory Season 12, Episode 4
♪ The autotrophs began to drool, Neanderthals developed tools ♪

The Big Bang Theory Season 12, Episode 7
♪ The autotrophs began to drool, Neanderthals developed tools ♪