
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

You can see the MATRIX, can't you?
The Big Bang Theory Season 1, Episode 12

He recommended that I go see
the third Matrix movie...
The Big Bang Theory Season 4, Episode 7

I'm in the MATRIX, Leonard;
I see everything.
The Big Bang Theory Season 5, Episode 10