There really isn’t much to explain about “Watchers On The Wall” except to say it was a big ass episode long battle reminiscent of the “Blackwater” episode from Season Two. And with that in mind I figured the best way to recap this ep was visually.
Don’t make Hodor angry. You wouldn’t like Hodor when he’s angry. Especially not if he is under the mental control of an angry crippled kid whose entire existence has been yanked away from him.