Welcome back to the Game of Thrones TV Book Club, a discussion space for Thrones viewers who have also read the five books (so far) of George R. R. Martin’s Song of Ice and Fire series.
As she paid homage to her ancestors in Sunday's episode, Sansa Stark made a surprising discovery in the crypts of Winterfell: a feather on the grave of her Aunt Lyanna. Where'd it come from? Think back.