Haven't seen it mentioned here but did anybody see the jealousy on Tyrion's face when he realized that Snow was in there laying the pipe to Dany? Interested how he feels about that and what he may do when it's time to choose between Lannisters and Targaryens again.
Also, how did Ned not tell Catelyn about who Jon really was? Snow's presence caused all sorts of strife in the stark household early on as said by Cat