(1) Episode 1 ends in a message for Janet to kill Joe, a one line message. When she reads it again in the beginning of episode 2, it is a two-line message. (Then there is another message, but it's a diffrent one.)
(2) When "glued" gas masks are broken so the poor guys can breathe, all of the sudden the masks become unglued. And no marks remain of victims' faces.
(3) When the taken break out helped by the thunder damaging the shield, they make a round way back to the town. The show up to that point was trying to be a little syfy but realistic. After that point it is not realistic at all. If it starts trying to be realistic again, I'll find it stupid. Sorry.