The Doctor Who Saved London

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Across
  1. 2. something you take to make you less sick
  2. 4. a sickness that spreads like crazy
  3. 5. places like London where people live
Down
  1. 1. a scientific idea not yet proven
  2. 3. the opposite of dirty
  3. 4. a person who helps those who are sick
  4. 6. the Dr. who figured that that the water was polluted