Literar-I: Riddle Me This

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Across
  1. 1. Halloween Heist planning got me through jail. (4,7)
  2. 5. Non-rhyming member of Dumas' threesome. (6)
  3. 7. Second member of "Divorced, beheaded, died; divorced, beheaded, survived" (4,6)
  4. 8. Hogwarts' gamemaker, then teacher; half human half giant with a penchant for fantastic creatures. Who am I? (6)
  5. 9. World's most famous animated feline (3)
Down
  1. 2. Leblanc's "Gentleman Thief" (6,5)
  2. 3. I might have seaweed for brains.(5)
  3. 4. I fell down the rabbit hole. Or did I? (5)
  4. 6. Winterfell's eldest, betrayed once too many. (5,5)