Constantine gets over the first hurdle by at least delivering a level potential, and not turning laughable right out of the gates. Now it has to prove it can suck you into the main character. If it does, this is going to have legions of fans.
Marry Me is a solid, cutesy effort with a great cast and a lot of potential. The problem is that it isn't going to wow you, or give you a lot of reason to make sure you never miss an episode. In the early '80s this would have managed four or five seasons, but this isn't the '80s.
American Horror Story Freak Show isn't quite as stupid as Coven, which was unwatchable, but it seems to be hoping to get there. It isn't even on par with a bad horror film, but if you're looking for something as a guilty pleasure to talk about, and are willing to admit you watch it, there's fun in here.
Scorpion has some potential, but the show tries to hide it as much as possible. The "true story," is taken apart until all that's left is "there was this smart guy once." It's so goofy in parts that it's hard to imagine a lot of people will care what else there is.