The writers are killing off lots of people in the soap opera.
kill en masse; kill on a large scale; kill many; "Hitler wanted to exterminate the Jews, Gypsies, Communists, and homosexuals of Europe"
If you say that a group or an amount of something has been killed off, you mean that all of them or all of it have been killed or destroyed. Their natural predators have been killed off It is an effective treatment for the bacteria and does kill it off All blood products are now heat treated to kill off any infection