In my opinion it's overall pretty bad though it got intersting casting with Halle Berry recovering her career since Catwoman, Goran Visnjic recovering his career from ER and that mustache guy from The West Wing and whatnot. Alas, I think Extant suffers from bad acting, loose script and generic direction.
There's a big secret ongoing, but it's charts best we mingle in some family drama with cyborg child and some mystery with that sneaky, behind-the-curtains asian boss who knows some shit. It's cheesy as fuck :"here's some snitch device you can conveniently remove in the toilet whenever you have to deal with some obscure shit, but please don't forget to bring oldschool electronics whenever your plot feels like it".
I don't know, maybe without the robot child and forced family drama this show would have been correct. But right now, it's mostly about Halle Berry's convenient haircuts. Come on, she acts like shit, their hair won't definitely do the trick.