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"Penny's beauty, like our love,
grows more with each PASSING day."
The Big Bang Theory Season 9, Episode 9

I can't spy with my little eye
something PASSING right through us.
The Big Bang Theory Season 8, Episode 19

...of a disembodied soul PASSING by.
The Big Bang Theory Season 2, Episode 8

Sorry, just PASSING through.
The Big Bang Theory Season 10, Episode 8

Arthur PASSING away
was harder on Sheldon
The Big Bang Theory Season 7, Episode 22