From any season.
Vote by replying.
I'll make a list.
The list so far:
4 5-08 Hardhome
3 6-09 Battle of the Bastards
2 6-10 The Winds of Winter
1 6-05 The Door
1 4-08 The Mountain and the Viper
1 1-09 Baelor
1 2-09 The Rains of Castamere
1 4-09 The Watchers on the Wall
1 4-01 Two Swords
1 2-09 Blackwater
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The Winds of Winter, Battle of the Bastards, Hardhome, The Watchers on the Wall, The Rains of Castamere and Baelor must be my top six episodes. Miguel Sapochnik directed half of the those episodes. Season 6 was floundering until Sapochnik delivered us the God tier final two episodes. He is easily the best director attached to GoT. It's a -blam!-ing shame Sapochnik isn't back the next season. The only acceptable explanation should be there they're giving him like the final four episodes.