user: Question: Who were the directors of the episode "Nano Nits" written by Nathan Cockerill?
Columns: ['Episode Number', 'Title', 'Villains', 'Director', 'Writer', 'Original airdate']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1 (11)', '"It\'s a Kind of Magic"', 'Leah Retsam and The Grandmaster', 'Toby Haynes', 'Keith Brumpton, Nathan Cockerill', '7January2008']
SQL:

assistant: SELECT "Director" FROM "Table" WHERE "Writer" = 'Nathan Cockerill' AND "Title" = '"Nano Nits"';