Well, okay, one MYSTERY solved.
The Big Bang Theory Season 6, Episode 8
♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 12, Episode 14
You are a MYSTERY.
The Big Bang Theory Season 10, Episode 11
♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 5, Episode 19
♪ Math, Science, History,
unraveling the MYSTERY ♪
The Big Bang Theory Season 12, Episode 16