The TV mystery of the last couple years has been solved: we now know how Jack dies on This Is Us. Our hearts still hurt, but the show must go on — but one thing we're worried about with this show is that the show will go on to kill another beloved character. Now that we know the series will dabble in flashforwards into the future, we're kinda freaking out about who's next. Yes, everyone on this show will eventually die, we know, but This Is Us toyed with our emotions regarding Jack's death for so long that we think they may rely on this storytelling device. While we hope not, honestly, let's prepare ourselves for the worst anyway and examine which character's death may inspire the next big mystery.