NIGHTMARE IN MIDVALE! Supergirl has been twisting and turning each night as she is haunted by visions of her past in her dreams. And with Halloween just around the corner, the town is getting up to all sorts of mischief while our sleepless hero stumbles through her patrols. Can Kara find the cause of her nightmares before her inner demons emerge? Find out as the nefarious Nightflame returns!