# That all started
with a big BANG #
The Big Bang Theory Season 11, Episode 9
HOWARD:
Previously on The Big Bang Theory...
The Big Bang Theory Season 10, Episode 13
NARRATOR:
Previously on The Big Bang Theory:
The Big Bang Theory Season 6, Episode 1
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 7, Episode 1
...making the BANG, BANG music.
The Big Bang Theory Season 1, Episode 5