21. 'And Now His Watch Is Ended' (Season 3, Episode 4)
In a word: "Dracarys." Watching Dany unleash the dragons on the odious slave masters of Meereen was the show's single most cathartic moment of violence to date. But the rest of this demanding episode showed the dark side of might makes right. From maimed and shellshocked Jaime Lannister to tortured and tormented Theon Greyjoy to the mutineers who kill the commander of the Night's Watch, the glories of war come at a terrible human cost.