Hard to Determine after Season 1 Colony is a hard show to rate after season 1 because it is a SciFi show without hardly any scifi in the first season which is dedicated to character and plot development. Granted, in 10 episodes that is about all you can do, but besides the big CG wall around LA there isn't a lot of Science Fiction in the show until the final episode of Season 1. I am giving it an 8 on potential, because they did do a good job of character development so that eventually I might care. The writing however makes that a very shaky 8 as there are some definite gaffe's in the writing already.
Main characters include Will Bowman (played by Josh Holloway, "Sawyer" from Lost) who is an ex navy seal and FBI agent married to Katie Bowman (Sarah Wayne Callies, wife of Rick on Walking Dead). He gets forced into working for the government (becoming hated by other civilians in the process as they hate collaborators) while Katie responds by joining "The Resistance" (original, not) with the promise of feeding them intelligence she gets from her husband. It is a bit absurd the amount of detail Will shares with Katie, I can only justify it in character because he is being forced and is sharing far more than he would have as an FBI agent. After all, who doesn't hate being occupied by an alien race; kind a universal bad situation. Unlike Falling Skies however there is potential for a lot more in what the aliens want. They came in and took over and established colonies (walled off portions of cities that weren't destroyed in the initial invasion). Major gaffe 1, aliens take over the world yet in way under a year (they are still counting days since occupation) they have a whole bunch of major cities with 200 foot thick, quarter mile high walls built around them. To boot they have a functioning government of collaborating humans and the army under their direction. So they appear to have come in and in a matter of days kicked the worlds rear so bad there was nothing left to fight with (or capable) and establish a functioning government, economy and heard a bunch of people in these colonies of which one is LA, and the first season takes place in exclusively. Season 2 looks like it will expand this a great deal; and this is where the potential comes in. Given it is absurd that any race could lay waste to the world AND organize it in weeks by any means, but it implies they have big plans for humans good or bad, all TBD and inspiring interest in what is to be. So season 1 was a little slow, it did a good job of laying a foundation for some potentially good story development which could happen fast given the final episode of season 1.
So I give it an 8 that will likely be updated as I see more of the show. It could be yet another huge disappointment, the networks seem to be pretty good at that, especially in the science fiction department. Hopefully things will get more thought out, and the writers add more a) realism in terms of development of events and b) reveal some substance. The pace is good, but gaffe's galore in the writing, and Katie shares Lori's naivete when it comes to fighting a revolt. Took until the final episode for her to accept that revolution is war and killing people because they are in the way and on the wrong side part of the job. May the writers and producers have grown greatly between seasons!