The FBI's Behavioral Analysis Unit hunts humanity's worst nightmares. But there are nightmares humanity doesn't dream are real.The BAU sends those cases down the hall.Welcome to Shadow Unit.This is the television show your TiVo never found. Five novella-length episodes from acclaimed science fiction and fantasy writers Elizabeth Bear, Emma Bull, Sarah Monette, Will Shetterly, and Amanda Downum, plus extra scenes and bonus material.