
Leonard's work is nearly
as amazing as THIRD graders...
The Big Bang Theory Season 3, Episode 10

Somewhere around
the THIRD floor,
The Big Bang Theory Season 7, Episode 7

A THIRD of your group died
and you did nothing, for fuck's sake.
Money Heist Season 3, Episode 2

...but by the THIRD one you realized there was
something strangely enjoyable about it.
The Big Bang Theory Season 8, Episode 21

And a THIRD person.
It's three-person chess.
The Big Bang Theory Season 4, Episode 22