Just finished watching the finale. What a great series that was. I am going to have to start the book tonight now.
spoiler
I called that ending though. I was certain there was absolute proof by episode 2 that it was dead outside. Just that fact that Holston was able to find Allison's body after taking off his helmet was a give away that the helmet was projecting some kind of illusion. Also that the suit they were given to go out and clean was somehow sabotaged and that the tunnel in the basement goes to other Silos. That the 18 was their Silo number. Although the game Fallout kind of made that obvious.
Admittedly I am a bit confused by the green screen outside. I don't really get how this technology can work as it is like a 3D hologram. It seems like the heat tape she stole a long time ago was replaced by Walter somehow which allowed her to survive outside unlike everyone else.
What now though? Obviously this is going to cause absolute chaos in their home Silo with people demanding to go outside. She could also cause some disruption at other Silos appearing in front of their cameras.
What is Bernard going to do in the Silo 18 server room? Maybe he can talk to other heads of IT? I really want the believe that the shooting star that other IT guy saw was a made man satellite that is allowing communication between Silos and that is why Bernard is being so harsh on this guy for potentially noticing it.