
Howard's invention, Sheldon's MATH,
The Big Bang Theory Season 9, Episode 18

- You're questioning my MATH?
- No, sorry.
The Big Bang Theory Season 2, Episode 18

♪ Math, Science, History,
unraveling the mystery ♪
The Big Bang Theory Season 7, Episode 18

♪ 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 7, Episode 13