I´m still watching as I like sci-fi and weird stuff, but I don´t like the fact that some things are not making sense.
In the first episode Sophia was eager to announce something to the world along with the President. ("We´ve been ready for a long time") and then in the next episode she doesn´t want to talk to the President ?????
I don´t think it makes sense.
Also clues have been given to imply those guys are aliens, I think it wouldn´t make sense to say later on that they´re time travelers. (Time travel in an "aircraift" as sci-fi buff I don´t buy that.
Last episode showed those guys crashing in Alaska, OK, but they were already wearing the proper outfits for the weather there, How come ?