House of Cards owes a bit of its popularity to binge watching. Once a season is dropped, we can watch as much or little as we like in one sitting. It’s the same reason other shows have stood the test of time; we can binge-watch in syndication for fun, or catch up with a series as it heads into a new season. But just how long will it take you to watch Game of Thrones before the April 15 Season 5 debut? Better clear a weekend.