Gendry's meeting with Jon really was all about Arya.
(Cut scene from S7E5.)
On a boat south, a grieving Daenerys tells Jon that she is no stranger to loss. For the first time, she tells him how she became the Mother of Dragons.
Warning: MAJOR SPOILERS for episode six.
Jorah reveals who cured his greyscale to Dany, Tyrion, and Jon.
(Cut scene from Season 7, Episode 5.)
Jon and Sansa exchange letters while he's at Dragonstone.
(Cut scene from S7E4.)
Before they leave Castle Black, Jon wants Sansa to learn to use a sword.