
If Jon is alive,
then Castle Black's where he'll be.
Game of Thrones Season 3, Episode 10

You left your daddy's CASTLE
looking for trouble, didn't you?
Game of Thrones Season 4, Episode 5

Yeah, but you were a lord's daughter,
and you lived in a CASTLE and you...
Game of Thrones Season 2, Episode 2

I saw it with my own eyes
on our way down to Castle Black.
Game of Thrones Season 6, Episode 6

You are not lord of this CASTLE, my lord.
Game of Thrones Season 6, Episode 8