Game of Thrones (season 3)
"Game of Thrones" rapidly became a critical and commercial success after it started airing in April 2011. A few days after ratings for the second season's premiere, "The North Remembers", hit a series high of 8.3 million viewers, HBO announced the show's renewal for a third season. Prior to that announcement, there had been rumors and reports that showrunners David Benioff and D. B. Weiss planned to shoot seasons three and four simultaneously. Benioff said that this would be very efficient, but impossible to write.
Game of Thrones (season 5)
A half-hour documentary, "Game of Thrones: A Day in the Life", aired on HBO on February 8, 2015. It covered one day of production of season 5 on three sets in Belfast, Dubrovnik and Osuna from the viewpoint of key crew members. The first official trailer for season 5 was released on January 30, 2015, and the season's second trailer was released on March 9, 2015. The world premiere of the first episode of the fifth season was held at the Tower of London on March 18, 2015.