The Network

The Network was a mysterious omniscient alien entity responsible for taking over many civilizations and replacing them with android replicas known as Blanks to prevent their destruction. 
It was able to see into the future and saw the imminent demise of all life on Earth so offered to prevent it, but in return it needed a resident of the planet to willingly embrace its own enslavement. (TV: Blank Space, Time And Time Again)
== History ==
For millennia, The Network invaded planets by studying them, finding someone to ask them for help to stop some form of a disaster. Once the person consents to The Network's help, they form a link with the person who becomes their "lynchpin", and the link only ends if the "lynchpin" dies or the bloodline ends. (TV: Time And Time Again)
==== Invasion Of Earth ====
After forseeing the destruction of Earth within a year, The Network saw it as a potential new planet to rule. The Network utilised a spacecraft that held the entity within it and produced multiple fake bodies that resembled humans to cover up the truth and prevent further investigation after crash-landing in a wooded area of Delph. After an old local, Rupert Kind, stumbled across the ship, incapable of comprehending an explanation, he wandered inside. (TV: Blank Space)
The Network showed a vision of the future they foresaw to him and promised to protect the Earth from it by replacing humanity with replicas in affect to improve them in anticipation. The Network manipulates Rupert into consenting and being replaced by promising to return his replica into his youthful form where he was young, thriving and had potential in life. Over the next two months, The Network slowly took over some of the residents of Delph, using Rupert as their "lynchpin". (TV: Time And Time Again)