
♪ 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