I've heard about that movie, but didn't see it. I hope Extant turns out to be as interesting as that. I kind of wondered about aliens, but who knows.
I did question one thing about the first episode though. A major sign that something went wrong is that Halle deleted 13 minutes of video footage from inside the space ship. Well, even now, we know that nothing is really deleted. It's still there and certainly, NASA could retrieve it if they wanted to. lol Kind of made me laugh.