Spoilers are ahead for The Umbrella Academy season 4's ending.

Summary

• The Umbrella Academy has played fast and loose with time travel and different eras since season 1.
• The Hargreeves siblings have tried to stop the apocalypse in each season, forcing them to travel to many unique timelines.
• The Umbrella Academy's fourth and final season adds even more complexity to the timeline-hopping plot.

The Umbrella Academy's original timeline, eccentric billionaire Sir Reginald Hargreeves (Colm Feore) adopts seven of the kids and forms the titular academy.

The The Umbrella Academy season 1's ending.

7 The Timeline Where Viktor Destroys The Moon

The Original Umbrella Academy Season 1 Timeline

Having originally aired in 2019, the first season of The Umbrella Academy is set in the then-present day. After 17-year-old Ben's death, the Hargreeves split up, starting with Allison, who left to pursue a career in Hollywood, and Diego, who became a day-saving solo act. Although Luther stuck around for the most part, he had a four-year stint on the Moon as part of a top-secret mission. Five, meanwhile, vanished sixteen years earlier — before Ben's death. All the siblings, including the struggling Klaus and wayward Viktor, reunite in 2019 for Reginald's funeral.

Viktor, who has been told his whole life that he doesn't have any powers, lashes out...

When the estranged siblings reconnect, they learn that Five has spent years in a post-apocalyptic future, and, despite looking like a teenager, Five's mental age is actually upwards of 50 years old. The time-traveling Hargreeves sibling reveals that the global apocalypse that he navigated for decades is imminent. Even though the Hargreeves siblings' relationships are strained, they band together to thwart the apocalyptic event. Unfortunately, Viktor, who has been told his whole life that he doesn't have any powers, lashes out, which prompts the other Hargreeves to team up against him.

Viktor misfires a beam of energy directly at the moon, causing it to crack open and hurl debris toward Earth.

As Viktor holds his siblings at bay, Allison sneaks up behind him with a gun and fires it near Viktor's ear, disrupting his focus. Although the Hargreeves are temporarily revealed, they soon realize that Allison hasn't prevented the apocalypse. When he stumbles, Viktor misfires a beam of energy directly at the moon, causing it to crack open and hurl debris toward Earth. Five decides the only way to get a second chance at saving the world is to jump to the past, and he takes the rest of the former Umbrella Academy with him.

6 The 1960s Apocalypse Timeline

The Hargreeves Siblings Most Stop Another Apocalyptic Event In 1963

The 1960s timeline is what causes how old every Hargreeves sibling is to become rather muddled. Despite being born on the same day, the siblings' ages are impacted when they're thrown back into different points in time at the end of season 1. In The Umbrella Academy season 2, it's revealed that Allison makes a life for herself in 1961, while Klaus, a soon-to-be cult leader, lands in 1960. Viktor, Luther, and Diego don't go back quite as far, landing a bit closer to the apocalyptic event that's set to occur in 1963.

...Five manages to travel back 10 days before the end-of-the-world-triggering event.

Five arrives the closest to the ill-fated event, materializing just before a doomsday that's linked to JFK's assassination in 1963. With Commission agent Hazel's (Cameron Britton) help, Five manages to travel back 10 days before the end-of-the-world-triggering event. Tasked with reuniting his siblings, including the amnesia-addled Viktor, Five must also evade the Handler (Kate Walsh) and her Commission army, which includes her adopted daughter-turned-assassin Lila Pitts (Ritu Arya) — another super-powered person. Thanks to the events of The Umbrella Academy season 2's ending, the Hargreeves land in a different 2019.

5 The Sparrow Academy Timeline

Reginald Realizes That He Should Choose His Superheroes More Wisely

In the third season of The Umbrella Academy, the Hargreeves siblings learn that their actions in the past created a new timeline. Given these shifts, returning to 2019 is not at all what they expected, as the Umbrella Academy has been replaced by a different superhero group: Sparrow Academy's stick together well into adulthood.

4 Sir Reginald's Reset Timeline

In addition to navigating the Sparrow Academy, the Hargreeves siblings realize that all of their time traveling created a grandfather paradox. As a result, a kugelblitz — a concentration of energy that's capable of warping spacetime so much that it creates a black hole — threatens to consume and destroy the universe. In The Umbrella Academy season 3's ending, Reginald's Hotel Obsidian is revealed to be a portal to the Hotel Oblivion — a machine built to redesign and reset the universe. While the siblings successfully reset the universe, their actions cause them to lose their powers.

3 The Alternate New Grumpson Timeline

Five Discovers The Timeline-Hopping Subway In Umbrella Academy Season 4

In The Umbrella Academy season 4, the Hargreeves siblings reunite to locate Jennifer (Victoria Sawal), a woman who was supposedly abducted by a cult that wants to bring about The Cleanse — an apocalyptic event that will clear up the timelines. Just before they head to New Grumpson, Maine, Ben slips marigold into his siblings' drinks, restoring their powers. Unfortunately, some of the Hargreeves can't control their powers — including Five, who accidentally teleports into a strange subway station that connects the show's many timelines. The first train Five takes brings him to an alternate version of New Grumpson.

2 The Phoenix Academy Timeline

Reginald Has Yet Another Superhero Squad In Umbrella Academy Season 4's Alternate Timeline

In the fourth and final season of the show, The Phoenix Academy and its make a brief appearance. ed by Umbrella Academy like Luther, Diego, and Klaus, as well as a few Sparrows, its possible The Phoenix Academy is a more refined version of Reginald's superhero team. While the Umbrellas are dysfunctional and the Sparrows are ruthless, the Phoenix Academy seems pretty well-adjusted. Although not much time is spent with the Phoenix outfit, it does confirm the existence of a new Hargreeves sibling: the fire-wielding Phil (Armaan Jawandha).

1 Five & Lila's Strawberry House Timeline

Umbrella Academy Season 4 Features A 7-Year Timeline Side Quest

Five and Lila are two Umbrella Academy season 4's ending.

All four seasons of The Umbrella Academy are streaming on Netflix.