No TV show is safe from at least one character’s death, but there have been many cases where a character’s demise has taken the audience by surprise, no matter how good or bad the character had been. TV shows often use the same narrative tricks that make it very easy for the audience to predict if a character will die and when, with one of the biggest red flags being when the show makes the character too likable so the audience becomes attached to them. However, other TV shows have opted for shock value and a surprise factor, killing characters that no one would have expected to die.
https://screenrant.com/tv-show-character-deaths-shocking-unpredictable/