HBO Productions purchased the television rights for the A Song of Ice and Fire series in 2007. Although busy completing A Dance with Dragons and other projects, Martin was heavily involved in the production of the television series adaptation of his books. Martin's involvement included the selection of a production team and participation in scriptwriting; the opening credits list him as a co-executive producer of the series. The original pilot was shot between October 24 and the 19th of November 2009, on location in Northern Ireland, Scotland and Morocco. It was received so poorly by HBO executives that they did not make a decision for four months after the pilot was delivered. In March 2010, HBO's decision to greenlight the series was announced, with the production of the series scheduled to start June 2010. However, HBO demanded that the first episode be reshot, and wanted all the scenes from Morocco scrapped. The first episode (Winter Is Coming) premiered on HBO in the United States and Canada on the 17th of April 2011. It was seen initially by 2.2 million viewers. The first season was nominated for 13 Emmy Awards, ultimately winning two: one for its opening title credits, and one for Peter Dinklage as Best Supporting Actor. HBO ordered a second season of Game of Thrones on the 19th of April 2011, two days after the series premiere. The second season obtained a 15% increase in budget in order to be able to stage the war's most important battle, the Battle of the Blackwater, in episode nine, which was written by Martin. Filming took place during 106 shooting days. During three-quarters of those, two crews (Dragon and Wolf) were working simultaneously in different locations. Alan Taylor was promoted to co-executive producer and directed four episodes, including the season premiere and finale. David Petrarca and David Nutter each directed two episodes, while series cinematographer Alik Sakharov and filmmaker Neil Marshall directed the remaining two. The second season premiered in the United States on HBO on the 1st of April 2012, and concluded on the 3rd of June 2012. U.S. viewership rose by approximately 8% over the course of the season, from 3.9 million to 4.2 million by the season finale. The second season won six of the twelve Emmy Awards for which it was nominated. Game of Thrones rapidly became a critical and commercial success after the second season. HBO renewed the series for a third season on the 10th of April 2012, nine days after the second season's premiere. Production began in July 2012 and concluded with the wrap of the unit filming in Iceland on the 24th of November 2012. The third season is based on the first half of the novel A Storm of Swords. Benioff had previously said that A Storm of Swords would need to be adapted in two seasons on account of its length. Benioff and Weiss also noted that they thought of Game of Thrones as an adaptation of the series as a whole, rather than of individual novels, which gave them the liberty to move scenes back and forth across novels according to the requirements of the screen adaptation. Season 3 saw the first significant use of the Valyrian languages, spoken in doomed Valyria and its former colonies in Essos. The constructed languages were developed by conlanger David J. Peterson based on the few words Martin invented for the novels. Peterson had previously developed the Dothraki language, used principally in season 1. The third season premiered on HBO on the 31st of March 2013, and concluded on the 9th of June 2013. The third season was seen by 14.2 million viewers. It won 2 of the 16 Emmy Awards for which it was nominated. Two days after third-season premiere, HBO ordered the fourth season on the 2nd of April 2013, which began filming in July 2013. The season is adapted primarily from the second half of A Storm of Swords, along with elements of A Feast for Crows and A Dance with Dragons. Showrunners David Benioff and D. B. Weiss co-wrote seven out of ten episodes. The remaining three episodes were written by Bryan Cogman (two episodes), and George R. R. Martin (one episode). For this season, the filming lasted 136 days and was completed on the 21st of November 2013. The fourth season premiered in the United States on HBO on the 6th of April 2014, and concluded on the 15th of June 2014. The season was met with largely positive reviews. It won 4 of the 19 Emmy Awards for which it was nominated. With its fourth season, Game of Thrones has become the most-watched HBO series in history (surpassing the fourth season of The Sopranos which had a gross audience of 18.2 million viewers), averaging 18.4 million viewers across multiple platforms, including live viewing, encores, DVR views, HBO GO and On Demand views. Up until the fourth season, Martin wrote one episode for each season. In 2022, Martin said that he had been estranged from the show during the production process of the last 4 seasons (starting with season 5). In the early seasons, Martin wrote and read scripts, consulted on casting decisions and visited sets. Over time, however, he stepped back to focus on his long-delayed next Thrones novel, The Winds of Winter. Following the gargantuan success of the fourth season, HBO ordered the fifth season on the 8th of April 2014, together with the sixth season, which began filming in July 2014. The season primarily adapts the storylines from A Feast for Crows and A Dance with Dragons, also with original content not found in Martin's novels. This season set a Guinness World Record for winning the highest number of Emmy Awards for a series in a single season and year, winning 12 out of 24 nominations, including Outstanding Drama Series. With a budget over $100 million for the whole season, filming for the sixth season began in July 2015 and ended on December. The season filmed in five different countries: Northern Ireland, Spain, Croatia, Iceland, and Canada. This season saw the overall plot of the show diverging from the source material. Some of the season's storyline is derived from content not yet published in Martin's A Song of Ice and Fire series, although a significant amount of material from A Feast for Crows, A Dance with Dragons and the upcoming sixth novel The Winds of Winter, which Martin previously outlined to showrunners David Benioff and D.B. Weiss, was used. The season was largely met with positive reviews. The Battle of the Bastards episode received immense critical acclaim, with many calling it one of the best television episodes of all time. U.S. viewership rose compared to the previous season, and by approximately 13 percent over its course, from 7.9 million to 8.9 million by the finale. The season won 12 of the 23 Emmy Awards for which it was nominated. Three days before the premiere of the episode The Red Woman, HBO ordered the seventh season. Due to necessary weather conditions required for filming, the production of the penultimate season of the show was delayed that year. Filming began only on the 31st of August 2016, at Titanic Studios in Belfast, and ended in February 2017. Unlike previous seasons, the seventh and eighth seasons largely consisted of original content not found in the source material. This season comprised only seven episodes. The showrunners stated that they were unable to produce 10 episodes in the show's usual 12 to 14 month time frame, as Weiss said It's crossing out of a television schedule into more of a mid-range movie schedule. The average runtime of an episode in this season was approximately 63 minutes. The series received 22 nominations for the 70th Primetime Emmy Awards and won 9 of them, including Outstanding Drama Series. Unlike its prior seasons, the final one took a year gap for its production and filming. The eighth season consisted of only six episodes, though the average runtime of an episode was 68 minutes, the longest of all seasons, with The Long Night consisting of 81 minutes. The season was met with mixed reviews from critics. While the performances, production values and music score were praised, criticism was mainly directed at the shorter runtime of the season as well as numerous creative decisions made by the showrunners. Many commentators deemed it to be a disappointing conclusion to the series. Despite this, the season received 32 nominations at the 71st Primetime Emmy Awards, the most for a single season of television in history, and won twelve, including Outstanding Drama Series and Outstanding Supporting Actor in a Drama Series for Peter Dinklage. Three years after the show ended, a prequel series, House of the Dragon, premiered on HBO on the 21st of August 2022. Based on parts of the novel Fire & Blood, the series is set about 200 years before the events of Game of Thrones. Ryan Condal and Miguel Sapochnik served as the showrunners for the first season. Five days after its premiere, the series was renewed for a second season by HBO. On September 1, Sapochnik departed as showrunner, with another veteran Game of Thrones director Alan Taylor replacing him as the co-showrunner for the second season. In June 2022, it was reported that a Jon Snow sequel series with Kit Harington to reprise his role was in early development at HBO. The working title is Snow and Martin confirmed his involvement with the project and that Harington initiated the idea. Also in June, Martin said there were still three other live-action series in development: 10,000 Ships (written by Amanda Segal), 9 Voyages aka Sea Snake (written by Bruno Heller), and the Dunk & Egg prequel series (written by Steven Conrad), tentatively titled either The Hedge Knight or Knight of the Seven Kingdoms. In January 2021, an animated drama series was announced as in development at HBO Max. In July 2021, two more animated series were in development at HBO Max, with one being set in Yi Ti, a nation in Essos loosely based on Imperial China.