Well, I watched half of the second episode of Invasion and I have to be honest: I just don't care what happens. I don't care about the characters at all and worse, I don't care about the hook. Not that I'm looking for a War of the Worlds style invasion here, because I'm not, but the mystery of what is really going on just does not compel me to watch the show. It makes me wish that I was caught up on Alias so I could watch the new season (as it stands I've only seen the first two seasons).
No matter. There are other, better shows to watch.