Death is a devastating experience that becomes an easy way for any story to raise its stakes, but its impact can be especially powerful in television since audiences get to know these characters week after week. Supporting and ancillary figures in television are usually the ones who meet their doom early on in a series’ run, while the deaths of major characters are reserved for later on as a way to create drama. That being said, many television series love to defy expectations and surprise their audiences.
Source：https://www.cbr.com/characters-die-at-beginning-of-tv-show/
