the audience will know before the people of Salem will. It will be revealed to us during November sweeps, but not to the Salemites, even though the murders will continue on after we know who it will be. A murder, or an attempted murder, will occur every 2-3 weeks. The second victim comes on September 8th. I also read that the cast is extremely thrilled with the serial killer s/l and claims we (the audience) will be shocked when the person is finally caught, so I have to believe it won’t be some nobody actor/actress, but someone we will all know.