People claim that knowing what happens in a story ahead of time but this has never been true. Shakespeare started everyone of his stories with a summery of what the play was about to be, including the ending. For that matter, so does Murder She Wrote and every feature film via their trailer.
Go try to spoil yourself. Read a summery of a show or movie and then see it. Come back and tell me you successfully spoiled it, then I’ll call you and idiot. So, if you think something has been spoiled for you in the past, that thing has less quality than Murder She Wrote, which ended every episode with the old lady, the Sharif, and the murder as survivors.