I Spy a Spy

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Across
  1. 2. A person who pretends to be someone else for a mission
  2. 5. A person who secretly gathers information
  3. 6. A person who works for two sides
  4. 9. A secret plan or mission
  5. 12. To watch someone closely without being seen
  6. 13. A message written in numbers or symbols
Down
  1. 1. Information that is kept hidden
  2. 3. The main character in 007
  3. 4. A person who gives secret information
  4. 7. A false name used by a spy
  5. 8. Secret writing that only some people understand
  6. 10. Something spies try not to reveal
  7. 11. A hidden message that needs to be solved