BDAY Crossword Puzzle

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Across
  1. 3. The past is ______, what comes before the main event of a story
  2. 5. Someone pretending to be something they are not, Amogus
  3. 6. The medium behind the familiar crackle of a record player
  4. 7. A network of paths designed to hide the exit
Down
  1. 1. A gathering with hidden identities
  2. 2. A production where dialogue may suddenly become melody
  3. 4. An apparition - or a masked figure beneath a Paris opera house
  4. 8. Something puzzling or difficult to explain