Episodes of the third season of "Game of Thrones" are available to watch on the HBO website, Amazon Prime Instant Video and can be purchased on iTunes as of March 2015. A paid subscription is required for users to watch "Game of Thrones" episodes on HBO and Amazon Prime.
The third season premiere of "Game of Thrones" is titled "Valar Dohaeris". It originally aired on the TV network HBO and is available to users who have a paid subscription to HBO. The paid subscription to HBO can be ordered through the network's website. HBO GO is HBO's online streaming service and it is free with a subscription to HBO.