Doctor Who

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Across
  1. 3. A doctor
  2. 7. the wife of the doctor
  3. 9. the last centurion
  4. 10. Delete
  5. 11. last name of a companion, also a day of the week
  6. 14. anagram
  7. 16. The real name of river song
  8. 17. robot dog
Down
  1. 1. impossible girl
  2. 2. Isaac Newton's law of ____
  3. 4. The girl who waited
  4. 5. The lonely assassin
  5. 6. The reason The Doctor changed time in "fires of pompeii"
  6. 8. Bad Wolf
  7. 10. Fish fingers and ____
  8. 12. The first female doctor
  9. 13. Silence will fall when the question is answered, Doctor ___
  10. 15. Exterminate