Jeph Loeb is the author of Batman: The Long Halloween , Batman: Dark Victory , Superman for All Seasons , Catwoman: When in Rome , Challengers of the Unknown Must Die! , Spider-Man: Blue , Daredevil: Yellow, and Hulk: Gray --all of which were collaborations with artist Tim Sale. He has also written Superman/Batman , Supergirl , The Witching Hour , Cable , X-Man , X-Force , The Ultimates 3 , and various other books. His TV and movie credits include Teen Wolf , Heroes , Commando , Buffy: The Animated Series, and Smallville .