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