10 Disturbing Mysteries Superheroes Couldn't Solve
5. What Happened To Number Five?
In The Umbrella Academy, a group of children who were spontaneously born around the world at the same time were collected and assembled into a team of superheroes. Eventually, the children get a bit older, and things go to hell, which served to disenfranchise everyone from one another.
One of the kids, who was only ever named "Number Five," had the ability to travel through time, but he had some difficulty getting the math just right. At one point, he simply disappears, and nobody on the team was aware of what actually happened to him. It was a mystery nobody could solve.
Granted, it was revealed to the reader that Number Five traveled to the future, where he found a post-apocalyptic landscape where everyone on Earth was dead. He lived in this world until he reached old-age, as he was unable to work the math just right so he could return to a time before the end of the world.
Eventually, he returned to the present, but through some time travel shenanigans, he is returned in his adolescent body, but with the mind of an octogenarian. Despite being solved, the entire time he was gone, nobody on the team could crack the mystery of what happened to Number Five.