Diabolical and treacherous, “Spellcaster” is a fantastic episode full of evil warlocks and betrayal. An auction house in White Plains, NY becomes the scene of two gruesome murders when a dark sorcerer infiltrates the warehouse to steal an ancient book known as the “Grand Grimoire.” Meanwhile, the return of the prodigal son unveils shocking revelations about a trusted ally. And, for one character, the more you practice the better you get, even where magic is concerned, but will dark temptations ruin everything?