Do you have to watch the previous seasons to be able to watch season 6?
Not at all. You do enjoy it a bit more if you know the character histories. This season is particularly guilty of referencing older seasons.
Ep. 5 tangles everything up so bad you wont believe it, btw. :shock: It confirms that those folks that accuse the show of being simply pro torture and full of evil Muslim stereotypes, really arent paying attention to the over arching storyline. You think what happens to Curtis in ep. 4 is shocking? You wont have time to worry about him for a while. :shock: