The first season of the American television drama series Homeland premiered on October 2, 2011 on Showtime and concluded on December 18, 2011, consisting of 12 episodes. The series is loosely based on the Israeli television series Hatufim created by Gideon Raff and is developed for American television by Howard Gordon and Alex Gansa. The first season follows Carrie Mathison, a CIA operations officer who has come to believe that Nicholas Brody, an U.S. Marine Sergeant, who was held captive by al-Qaeda as a prisoner of war, was turned by the enemy and now poses a significant risk to national security.
The season received universal acclaim, scoring a Metacritic rating of 91 out of 100 from 28 critics. TV Guide named it the best TV show of 2011 and highly applauded the performances by Damian Lewis and Claire Danes. Metacritic determined Homeland to be the second best TV show of 2011 according to major TV critics, by aggregating the critics' year-end top ten lists. The series won both the Golden Globe Award for Best Television Series – Drama and the Primetime Emmy Award for Outstanding Drama Series for this season.
The original broadcast of the pilot episode on October 2, 2011 received 1.08 million viewers, becoming Showtime's highest-rated drama premiere in eight years. The episode received a total of 2.78 million viewers with additional broadcasts and on demand views. The finale episode of season one received 1.7 million viewers, making it the most-watched season finale of any first-year Showtime series. The series also performed well in the UK, where it aired on Channel 4, with the pilot episode drawing 3.10 million viewers, and the finale drawing 4.01 million viewers.