SciFi Alien Invasion apocalyptic type series; invading aliens wreaking havoc on humans and decimating cities, taking the older children hostages making them slaves. Another different alien race arrives, which added to the plot nicely. I would recommend people to watch this series if this is your type of SciFi entertainment. Watch the trailers to help decide if it is your cup of tea. It did take watching the first 5 episodes to become engrossed in the series.