In the final episode of 'Paradise' Season 2, it is revealed that 'Alex', which Sinatra has been hiding, is a supercomputer more advanced than any previous AI, potentially capable of time travel. This device was created by Link, who is now determined to shut it down, fearing that it has taken on a mind of its own and could be detrimental to humanity rather than a salvation.
Meanwhile, Sinatra theorizes that Link is, somehow thanks to Alex, her late son Dylan, and that Alex is key to reversing the events that affected Earth, with Xavier being the one who must solve it. Alex has provided instructions for a 'User X', which Sinatra deduces is Xavier. Before sacrificing herself to deactivate the bunker, Sinatra tells Xavier that he must go to Alex and save them all, believing that he has already done so in the future, leading to temporal anomalies like Link/Dylan.