MARVEL COMICS. Greg Salinger was just your typical merc for hire - FOOLKILLER - killing those that he deemed to be "foolish." And for money. But that life is behind him now. Today, he's a psychiatrist, trying to help others. But now S.H.I.E.L.D. wants him to try to rehabilitate super villains. The catch? If these "patients" don't make enough progress, they're dead! Parental Advisory.