Some hints there for the R + L = J theory. Sansa in the crypts in front of her aunt’s statue and Littlefinger tells the story about R and L.
Later in the episode Melisandre says again that there’s power in king’s blood (descendants of kings). In this episode she was talking about Shireen (Stannis’ daughter), but she had previously said the same thing about Gendry (Robert Baratheon’s bastard son). In tonight’s episode, Melisandre told Jon that there was power in him. Was she hinting that Jon is a descended from a king and giving some support for the R + L = J theory?