Competitors Companion Crossword - July week 4

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Across
  1. 1. Put this word with Sesame and you should be let in
  2. 4. First name of famous aviation pioneer who disappeared in 1937
  3. 5. It is a myth that this animal buries its heads in the sand
  4. 7. Character from Lord of The Rings played by Sir Ian McKellen
Down
  1. 2. Dynamite inventor
  2. 3. Incompetent cops in silent films
  3. 4. Spouse of Guinevere
  4. 6. Hamelin had lots of them until the Pied Piper came along