Website HULU has continued to add more episodes of Stargate SG-1 to it’s site, with the addition of all 22 episodes of Season 4 Stargate SG-1. Season’s 1,2 and 3 are still available to watch for free! Remember Season 4 includes arguably the best episode of SG-1 – ‘Window of Opportunity’. Click here to see them! (Available to US residents only)