I have watched this show through ep twelve. It's really sort of hard to post spoilers about this show. Part of this is because, as it goes on, I get more and more confused . . . but in a good way. I'm constantly finding myself thinking "Wait, I thought that he . . ." and "But weren't they . . ."
I then go back and look at a previous episode to check, and find I pick up all sorts of little things that were scarcely noteworty on first viewing actually were important indications of things to come.
I'm really tempted to go back and do a marathon Lucifer-watching session of all the eps I've watched so far. At an average running time of an hour five minutes per, that'd only be thirteen hours ;D.
But then there's eight more eps after that. Eight and a half more hours.