(Spoilers) A twenty hour canvas was simply too broad for this story. Writing, directing, acting, casting, all seemed on a downhill trajectory after the first four nights. However, I thought Major Crawford (Joel Gretsch) was a terrific sci-fi villain; beautifully written, ferociously acted. In fact, his pursuit of aliens and every human they might have touched was the key to the whole series, alas merely the first part. He was far more dangerous than any perceived extraterrestrial threat or plot, and killing him off midway was a huge error. His son and granddaughter, inheritors of the project, paled in comparison. It was Maj. Crawford's face we should have been watching as "Ally" fulfilled her destiny. Kudos to Steve Burton, Anton Yelchin and Catherine Dent for wonderful performances (also in the first half). Dakota Fanning was excellent as Ally; unfortunately the production fell apart around her.
