So, it was Reginald Hargreeves’ obsessive pursuit of his lover’s resurrection that broke the timeline. “Strange” enough. His wife, Abigail, one hell of a scientist in her days, had synthesized two new elements called Marigold and Durango. Unbeknownst to her, the physical reaction between these two particles destroyed the world, and Reginald failed to save Abigail. That was the reason why he had released the Marigold Pollens into the world. His plan was to raise seven Marigold-powered superheroes to fight against the deadly guardians, who would ultimately sacrifice their lives to reset the universe. But obviously, things didn’t go as planned. Allison had a change of heart in season 3’s ending, and she killed Reginald before he could finish the process. As a result, the Umbrella Academy survived and walked into the new timeline. And everything was normal until they didn’t get the Marigold back in their bodies.