Son no.3 and I started to watch this series because it seemed to be getting a lot of hype. We are up to, I think, episode 4, maybe 5, it's hard to remember. In our opinion (and we hardly ever agree on anything) it started off okay-ish, but went downhill. It became very Dr Who-like, and the characters become very offhand about the apocalyptic situations they meet.
   So - meh. Maybe the later episodes get better, but I'm not sure we'll ever see them.