Three countries. Ten days on set. One show—perhaps the biggest TV series in the world. For the fifth season of HBO’s Game of Thrones, EW undertook an epic adventure to join the fantasy hit’s cast and crew for a globe-trotting all-access tour of Westeros and Essos to discover how the acclaimed mega-production pulls off bringing author George R.R. Martin’s savage world to life—and what new twists season 5 has in store. We got to see Peter Dinklage and Lena Headey acting up a storm in Croatia, endured fan mobs and biting serpents with Nikolaj Coster-Waldau in Spain, and hung out with Emilia Clarke and witnessed the loss of a cast member in Northern Ireland—all while chronicling what’s certain to be a game-changing season.