Although the timeline changed a lot during the first two seasons of “The Umbrella Academy,” Luther, Allison, Diego, Klaus, Five, and Viktor never went as far as to change anything too significant about their personal histories. That is, until now. The show’s third season establishes a new timeline with significantly different, life-changing events taking place on the show’s most important date: September 1, 1989. In Episode 1, Reginald Hargreeves explains to the Umbrellas that he adopted the seven Sparrow Academy siblings instead of them after meeting them in the 1960s and finding himself “repulsed” by their behavior. The episode’s opening sequence shows Reginald mirroring scenes from the first season, but with different children and a new academy.
This opening sequence reveals another big change. In this timeline, there were only 16 children born on that day in 1989, not 43. The reason for this becomes a major question mark hanging over the season. Eventually, the Umbrellas discover that their mothers all died on September 1, 1989, before giving birth to them. Later Viktor learns that Harlan unwittingly killed the moms when his own mother, Sissy, died that same morning.
But this revelation just opens a can of worms — or a can of questions, as it were. How do the Umbrellas exist if they weren’t born? Season 3 only accounts for seven of the children born that day, or eight if you include Lila. Who are the other “siblings” and what happened to them? Will they make an appearance next season?