"The ending that we planned was always meant to be a payoff for the seven-episode arc. It won't close off the whole story, but it will show you where we would go in a third season ... it gives you a huge mythology so that you understand so much about what has happened."
Just followed a link from TV Squad to SCI FI Wire regarding the future of this show, which basically says that the producers have a plan if the show is cancelled.
According to executive producer Carol Barbee, they shot an alternate ending to the upcoming second season that will wrap up the show in the event it isn't picked up for a third season.
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