♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 5, Episode 15
I don't think that
qualifies as a MYSTERY.
The Big Bang Theory Season 7, Episode 3
♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 5, Episode 5
♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 12, Episode 4
The MYSTERY continues.
The Big Bang Theory Season 7, Episode 17