Solve it... if you dare

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Across
  1. 1. Costume chain
  2. 9. _ twist
  3. 10. _ of London
  4. 11. They did the _ _
  5. 13. "You look like you've seen a _"
  6. 15. Babysitters beware
  7. 16. Spooky, scary, _
  8. 17. Cocktail with tomato juice
  9. 19. Halloween's full name
Down
  1. 2. _ patch
  2. 3. Halloween greeting
  3. 4. Gaelic festival, beginning Oct 31
  4. 5. Scream queen
  5. 6. Don't say her name 3 times
  6. 7. Season of the _
  7. 8. Who ya gonna call?
  8. 12. Carve a _
  9. 14. Interview with a _
  10. 18. 16th century Queen of England