
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 5

♪ That all started
with a big BANG ♪
The Big Bang Theory Season 12, Episode 21

♪ That all started
with a big BANG ♪
The Big Bang Theory Season 7, Episode 12

♪ Bang! ♪
The Big Bang Theory Season 5, Episode 1

♪ That all started
with a big BANG ♪
The Big Bang Theory Season 12, Episode 5