You know,
the German PHILOSOPHER,
The Big Bang Theory Season 5, Episode 7
Persian PHILOSOPHER, Al-Ghazali
The Big Bang Theory Season 10, Episode 7
he was a PHILOSOPHER.
The Big Bang Theory Season 7, Episode 12
The PHILOSOPHER
Henri Bergson
The Big Bang Theory Season 7, Episode 12
of 17th century PHILOSOPHER
René Descartes.
The Big Bang Theory Season 12, Episode 10