
Sheldon, that's not how
you write a thank you CARD.
The Big Bang Theory Season 12, Episode 2

She wrote that
in a birthday CARD once.
The Big Bang Theory Season 12, Episode 22

A colon calling CARD, if you will.
The Big Bang Theory Season 6, Episode 9

Turn over the seventh CARD.
The Big Bang Theory Season 4, Episode 18

And was your CARD
the jack of diamonds?
The Big Bang Theory Season 4, Episode 18