After tricking Spider-Man to the bridge where Gwen Stacy's death occurred, on the pretext of having kidnapped Mary Jane, he declared his own loneliness and love for Peter. When Peter laughed, he threw himself off the bridge. He reappeared some time later in a mental institution, completely incapacitated, believing himself to be Sergei Kravinoff rather than his true self. He later reappeared in his Chameleon identity as part of the Sinister Twelve villain team organized by Norman Osborn as the Green Goblin.