
...was a THIRD century Roman priest
who was stoned and beheaded...
The Big Bang Theory Season 3, Episode 15

I get it. I'm the THIRD wheel. Heh.
The Big Bang Theory Season 3, Episode 4

On his THIRD cook, he started a fire.
Breaking Bad Season 5, Episode 10

What THIRD party?
Breaking Bad Season 4, Episode 7

and I don't want
to be a THIRD rail.
The Big Bang Theory Season 7, Episode 15