Claim: Game of Thrones (season 1) featured Irish actress Michelle Fairley as Catelyn Stark.

The first season of the fantasy drama television series Game of Thrones premiered on HBO on April 17 , 2011 , at 9.00 pm in the U.S. , and concluded on June 19 , 2011 . It consists of ten episodes , each of approximately 55 minutes . The series is based on A Game of Thrones , the first novel in the A Song of Ice and Fire series by George R. R. Martin , adapted for television by David Benioff and D. B. Weiss . HBO had ordered a television pilot in November 2008 ; filming began the following year . However , it was deemed unsatisfactory and later reshot with some roles being recast . In March 2010 , HBO ordered the first season , which began filming in July 2010 , primarily in Belfast , Northern Ireland , with additional filming in Malta .   The story takes place in a fictional world , primarily upon a continent called Westeros , with one storyline occurring on another continent to the east known as Essos . Like the novel , the season initially focuses on the family of nobleman Eddard Stark , who is asked to become chief advisor to his king and longtime friend , Robert Baratheon . Ned must find out who killed the previous Hand of the King , Jon Arryn , while trying to protect his family from their rivals the Lannisters . He uncovers the dark secrets about the Lannisters that his predecessor died trying to expose . Meanwhile , in Essos , the exiled Viserys Targaryen , son of the former king , believes he still has the rightful claim to the throne .   Game of Thrones features a large ensemble cast , including Bean , Addy , Peter Dinklage , Lena Headey , Nikolaj Coster-Waldau , Michelle Fairley and Iain Glen . Newer actors were cast as the younger generation of characters , such as Kit Harington , Sophie Turner and Maisie Williams .   Critics praised the show 's production values and cast , with specific accolades for Dinklage 's portrayal of Tyrion Lannister . The first season won two of the thirteen Emmy Awards for which it was nominated , for Outstanding Supporting Actor in a Drama Series -LRB- Dinklage -RRB- and Outstanding Main Title Design . It also received a nomination for Outstanding Drama Series . Bean and Emilia Clarke also received individual accolades , as did Ramin Djawadi for music . U.S. viewership rose by approximately 33 % over the course of the season , from 2.2 million to over 3 million by the finale .