6. 'Hold the Door'
Season 6, Episode 5: "The Door"
Nietzsche's warning that he who fights monsters may well become a monster himself has received more than its fair share of support here. But few things were more heartbreaking, and surprising, than what happened to young psychic Bran Stark and the towering, mentally disabled Hodor. Fleeing from a raid on the cave where the little lord was learning magic, Bran and his companions exited the cavern with the living dead just yards behind them. Thanks to the boy's telepathic time travel, his friend Meera Reed's plea to "hold the door" was psychically burned into the mind of a young servant named Willas decades earlier. His vocabulary was reduced to a shortened single-word version of the phrase: "Hodor." Through a cruel twist of fate, Stark could only live to help save humanity from the White Walkers by accidentally inflicting damage on an innocent man. The revelation was breathtakingly sad.