
- Why do you have a HISTORY textbook?
- No, it's... It's not a big deal.
The Big Bang Theory Season 6, Episode 6

in the HISTORY of cinema.
The Big Bang Theory Season 11, Episode 13

# Math, Science, History,
unraveling the mystery #
The Big Bang Theory Season 11, Episode 12

♪ Math, Science, History,
unraveling the mystery ♪
The Big Bang Theory Season 7, Episode 4

♪ Math, Science, History,
unraveling the mystery ♪
The Big Bang Theory Season 5, Episode 21