He recommended that I go see
the third Matrix movie...
The Big Bang Theory Season 4, Episode 7
You know how I know
we're not in the Matrix?
The Big Bang Theory Season 2, Episode 2
I'm in the MATRIX, Leonard;
I see everything.
The Big Bang Theory Season 5, Episode 10
I haven't seen him this stuck since he
tried to figure out the third Matrix movie.
The Big Bang Theory Season 3, Episode 14