It basically invalidated the whole purpose of everything leading up to that show. The primary storyline involved Laura, as a scientist, trying to explain and expose this new species to the world while fighting a conspiracy to hide them... why bother, they've now apparently taken over the world. ;-)
All her efforts, not to mention those of Rich, were a waste of time, including the whole far-fetched homemade diving bell. The world is obviously going to find out about the species now, and it had nothing to do with Laura's efforts.

There was nothing wrong with the finale in and of itself, but when viewed as part of a series, it just made everything leading up to it pretty much pointless. I have never watched a season or series finale where I felt, "Well, I just wasted 15 hours of my life" until this one. I honestly would have felt better about the whole series had it ended with episode 14.

Following the buzz on the internet, it was fairly clear when it aired that this would be the end of the series, and I was left phenomally disappointed. This one episode took the series from a definite buy on DVD, to an unlikely purchase for me.

that the good guys win. The spent the whole show trying to find out about the new species so they reveal it to the world, and they did find out about the new species, but in the end they failed to get the word out in time. The bad guys won. The creatures attacked. The Earth was destroyed. Game over.

Maybe they could have done a better ending if they'd had more time, but didn't have much time to wrap it up, and I thought they did a good job with what they had to work with. It was a lot better than the wishy-washy cliffhanger ending of Invasion.