DRUGS, DOPPELGÄNGERS, and DORIAN GRAY

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Across
  1. 4. Known for "punching the guy next to him"
  2. 5. Prolific serial killer from Victorian England
  3. 9. Another word for eternal youth
  4. 11. A well-respected scientist
  5. 12. Evil twin of famous Italian character "The Mario"
Down
  1. 1. Former pharmaceutical turned illegal substance
  2. 2. Example of an evil alter ego
  3. 3. German legend about making a deal with the devil
  4. 4. Popular drug in Victorian England, problematic today in NH
  5. 6. An undesirable doppelgänger
  6. 7. Alter ego of Marvel character Peter Parker
  7. 8. An alternate personality
  8. 10. Self-serving character created by Oscar Wilde