When you play the Game of Thrones, you play it one hour at a time. With a novelistic sprawl inherited from author George R.R. Martin's epic fantasy series A Song of Ice and Fire, the popular HBO show often feels less like a premium-cable series and more like a 40-hour movie. But showrunners David Benioff and D.B. Weiss have delivered a number of stand-alone knockouts — individual installments that soar high above the rest like Daenerys' dragons. As the April 12 premiere of Season Five approaches, sit back in your Iron Throne as we settle the question of which episodes from the first four seasons reign supreme.