1. Getting the Butcher’s Boy Killed
Season one, episode two
The then-prince catches Arya playing with her friend the butcher's boy and quickly draws his sword on him. When Arya defends poor Mycah, Joffrey takes a few swings at her before her direwolf, Nymeria, comes to the rescue. Mycah is later murdered by The Hound, and Nymeria's sister, Lady, is executed in her place. The boy's death is disturbing, but come on – viewers really can't stand it when a direwolf dies.