
♪ Then nearly 14 BILLION years
ago expansion started... Wait! ♪
The Big Bang Theory Season 12, Episode 21

♪ Then nearly 14 BILLION years
ago expansion started... Wait! ♪
The Big Bang Theory Season 12, Episode 18

♪ Then nearly 14 BILLION years
ago expansion started... Wait! ♪
The Big Bang Theory Season 7, Episode 14

♪ Then nearly 14 BILLION years
ago expansion started... Wait! ♪
The Big Bang Theory Season 7, Episode 7

♪ Then nearly 14 BILLION years
ago expansion started... Wait! ♪
The Big Bang Theory Season 12, Episode 6