First, Spider-Man takes on “The Schizoid Man” and beats the snot out of him. Totally forgettable, but it’s a story line that has been developing for several issues.
But why is Spidey acting so bloodthirsty…?
Curt Connors advises Spider-Man that the enervator, a device used to boost Spidey’s powers several issues ago, may have had side-effects. Turns out, it was the this.
Connors eventually cures him. Throughout, we see Electro working in the shadows, and the last panel of issue #40 shows the new, reassembled Frightful Four.