Well, what can I say. Totally underwhelming. Think American soap opera and you won't be too far from it. Think Rocky IV, Saw VI and the myriad of other bad, bad sequels. Bad actings (even from the Brits - is it US series stupidity contagious?), bad script, bad locations and bad new characters.
What else can I say to reach 100 words? Well it is bad. Save yourself 1 hr and go see something else. Die hard fans will cry foul, but let's call it for what it is: a very bad sequel.
Well, Torchwood is dead. Outsourcing does not work. Good luck! It's been a great ride!