TV series example of the word

The Big Bang Theory Season 3, Episode 16
I'm sorry, you sent more than one letter about that?

The Big Bang Theory Season 6, Episode 19
Howard, I found this letter from your dad in a box.

The Big Bang Theory Season 2, Episode 5
...whose name starts with the last letter of the one I said, okay?

The Big Bang Theory Season 12, Episode 9
and Sesame Street Letter School,

Game of Thrones Season 1, Episode 7
May I see that letter, Ser Barristan?