# That all started
with a big BANG #
The Big Bang Theory Season 11, Episode 17
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 7, Episode 7
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 23
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 18