I have not watched the past seasons but decided to give it a chance this year and can see why so many have given up on this show. I finally pulled the plug on it half way through this weeks episode. The having to nurture the rogue aliens baby in order to ease its pain angle has become too much to handle. It's not just that though; The characters are extremely boring and I lost interest in them quickly. The original sereis was designed as a mini-series and you can now see why. Trying to gain several seasons with this idea just won't work unless you have a story line that is going to have people watching and anticipating what is going to happen next. We have to be able to identify with the characters and empathize with their fight for humanity. We need to be mad at the aliens and enjoy it when they get their butts kicked from time to time. It is very hard to be interested in this show. I neither like the good guys nor hate the aliens. In fact, I could care a less about watching either of them.
Poor story line + Boring Characters = Cancelled show
All this show does is prove that aliens can be just as boring as humans.