![The scientists
that proved the big bang,
The scientists
that proved the big bang,](https://content2.mcqstudy.com/ss/tbbt-12-13-00:10:02.602.jpeg)
The scientists
that proved the big BANG,
The Big Bang Theory Season 12, Episode 13
![BERNADETTE: Previously on
The Big Bang Theory...
BERNADETTE: Previously on
The Big Bang Theory...](https://content2.mcqstudy.com/ss/tbbt-10-24-00:00:03.671.jpeg)
BERNADETTE: Previously on
The Big Bang Theory...
The Big Bang Theory Season 10, Episode 24
![♪ That all started
with a big bang ♪
♪ That all started
with a big bang ♪](https://content2.mcqstudy.com/ss/tbbt-12-2-00:01:44.930.jpeg)
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 12, Episode 2
![♪ That all started
with a big bang ♪
♪ That all started
with a big bang ♪](https://content2.mcqstudy.com/ss/tbbt-5-3-00:02:26.477.jpeg)
♪ That all started
with a big BANG ♪
The Big Bang Theory Season 5, Episode 3