Eventual HPSS- There's been a horrible accident and Harry's been attacked by a werewolf. Now a werewolf himself, he has to turn to Snape to save both himself and others from himself.

AU-5th year. Hermione tries to cast a spell to make Crookshanks talk and it backfires. Now every cat in Hogwarts can speak and they're taking advantage of it as only a cat can...