
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 1

♪ Bang!♪
The Big Bang Theory Season 12, Episode 2

♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 4

♪ That all started
with a big BANG ♪
The Big Bang Theory Season 7, Episode 13