# Math, Science, History,
unraveling the mystery #
The Big Bang Theory Season 11, Episode 17
♪ Math, Science, History,
unraveling the mystery ♪
The Big Bang Theory Season 12, Episode 15
♪ Math, Science, History
The Big Bang Theory Season 12, Episode 23
# Math, Science, History,
unraveling the mystery #
The Big Bang Theory Season 11, Episode 8
♪ Math, Science, History,
unraveling the mystery ♪
The Big Bang Theory Season 12, Episode 2