A Million Little Things fans are pretty familiar with dark storylines. After all, the entire series began with the death of Jon Dixon (Ron Livingston), a beloved friend and relative to all the show's main characters, so it's always had a sad tone. But, even with that, the latest fan theory is a lot to handle. Some fans believe that Theo will die on A Million Little Things, and I honestly don't know if I can take all that heartbreak.

Tragedy is a big part of A Million Little Things. In addition to Jon's death, the show has dealt with Gary (James Roday) and Maggie's (Allison MIller) journeys through each of their cancer diagnoses and the loss of Maggie's brother. But, some fans think that there's more tragedy in store for the characters, and this time it'll strike one of the youngest on the show. It seems like too much for even A Million Little Things for Eddie and Katherine's little son Theo (Tristan Byon) to meet his fate, and yet some fans make a pretty convincing argument. One fan on Reddit said:

It's a known fact that Theo gets nosebleeds frequently. Nosebleeds can mean nothing and just be a common childhood ailment. But, then again, they could be sign that something bigger is going to affect Theo soon.

Series creator DJ Nash stoked the flames of this theory about Theo with a tweet on Nov. 13. He wrote, "Sometimes a nose bleed is more than a nose bleed. There, that ought to get you all talking." Well, fans certainly did start talking.

A lot of fans think that Theo will get sick and require some sort of medical help from a relative. Delilah's baby daughter Charlie is secretly Theo's sibling, since they share Eddie as a father. One fan thinks that that secret family history will come into play when the doctors go digging into everyone's medical history.

One fan tweeted, "Theo will need a transplant of some sort and if Katherine and Eddie aren’t a match they will test Charlie and find out that Charlie is not his or the kids will then know Charlie is not Jon’s."

Another fan on Reddit posited a similar theory about the repercussions of Theo's possible illness. They said, "The nosebleed turned out to be something serious and they needed bone marrow or something from a sibling and bam... It comes out about the baby because the baby is a match."

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The idea of Theo getting sick is really upsetting. But, the characters of A Million Little Things always find a way to work through their hardships. Plus, if these fan theories are correct, then Theo's sickness could help the characters face some big truths about their relationships.

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