Facing the crisis of an alien invasion Oliver and Barry have brought Sara Lance and the rest of the Legends back to present-day Earth to help Mulder, Scully and the newly assembled task-force try to stop the fast-coming invasion. Can the Legend help save the day, or will a group that can't handle a crisis without conflict end up killing each other instead of the Colonists?
In which Thea comes up with a solution for Roy's Bloodlust problem after the Lotus failed.
After dealing with Nazis from Earth-X and nearly losing Professor Stein to Death's Embrace, the last thing Sara needed to deal with was her mother.
Characters from different arrowverse timelines are kidnaped to watch the story of the Legends.