Game of Thrones season 7 episode 1: The Hound had a huge callback to season 4 you may have missed

After months of waiting, Game of Thrones has finally returned, the premiere steadily setting up the (shorter) season to come.

**Spoilers ahead for season seven, episode one ‘Dragonstone’**

One character to make a notable appearance includes The Hound, who is currently travelling Westeros with the Brotherhood Without...