♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 10
♪ Bang! ♪
The Big Bang Theory Season 7, Episode 23
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 16
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 6