user: ### NOW ANSWER:
Question: The episode which originally aired on December 17, 2004  was written by whom?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [206.0, 1.0, '"Hail and Farewell (Part 2)"', "Terrence O'Hara", 'Stephen Zito', 'September 24, 2004']
SQL:

assistant: SELECT "Written by" FROM "Table" WHERE "Original air date" = 'December 17, 2004';