So many twists and turns in this series it always keeps you guessing. Characters I have come to really enjoy and cheer for as they look for answers. Nice that some of the scientific endeavors scientists are looking to attempt are included even if they succeed in the series and that we are really not quite there yet. There is going to be a big hole in my schedule when the final season 5 is complete, but will get that also so I can enjoy it all over again